Description

Tenergy T4s Intelligent Universal Battery Charger + 4 x 18650 M26 3.6V 2600mAh Lithium-Ion Batteries (Button Top + PCB) combines an intelligent four-bay universal battery charger with four high-capacity protected lithium-ion rechargeable batteries. Each included 18650 M26 battery provides a nominal voltage of 3.6V and a capacity of 2600mAh, featuring a raised positive button-top terminal and integrated PCB protection circuitry. This convenient charger and battery bundle is designed for compatible electronic equipment requiring protected 18650 lithium-ion batteries and offers a practical rechargeable power solution for portable lighting, electronic instruments, and other suitable applications.

The Tenergy T4s Intelligent Universal Battery Charger features four independently controlled charging slots that allow compatible rechargeable batteries to be charged individually or simultaneously. Its microcomputer-controlled charging system supports lithium-ion (Li-ion), lithium iron phosphate (LiFePO4), nickel-metal hydride (NiMH), and nickel-cadmium (NiCd) rechargeable batteries. Individual yellow LED indicators display charging progress, while automatic charge completion detection, reverse-polarity protection, and short-circuit protection help manage the charging process. The charger accepts AC 100-240V, 50/60Hz or DC 12V input and provides output voltages of 4.2V, 3.6V, and 1.48V for supported battery chemistries. Maximum charging current is 425mA per slot with four occupied slots or 850mA per slot with one or two occupied slots.

The bundle includes four 18650 M26 3.6V 2600mAh lithium-ion rechargeable batteries with button-top terminals and PCB protection. The underlying LG Chem INR18650 M26 cell specification provides a 2600mAh nominal capacity, 2500mAh minimum capacity, 4.2V charging voltage, 1250mA standard charging current, and 2.75V standard discharge cut-off voltage. The underlying cell has a maximum discharge-current rating of 10A, although the finished protected battery may have a lower permitted current depending on its PCB protection circuit. The original cell weighs approximately 44g before any added protection circuitry or terminal modifications. The finished battery may be longer than a standard unprotected 18650 cell because of its raised positive terminal and integrated PCB. Before installation, verify the equipment's voltage, battery compartment dimensions, button-top contact requirements, and allowable discharge current. These batteries are not replacements for 1.5V AA batteries, 3.2V LiFePO4 batteries, or nonrechargeable lithium batteries.

Specifications

Product Name:	Tenergy T4s Intelligent Universal Battery Charger + 4 x 18650 M26 3.6V 2600mAh Lithium-Ion Batteries (Button Top + PCB)
Product Type:	Intelligent universal rechargeable battery charger and protected lithium-ion battery bundle
Charger Brand:	Tenergy
Charger Model:	T4s
Charger Part Number:	01432
Charger Type:	Microcomputer-controlled intelligent universal rechargeable battery charger
Charging Slots:	4 independently controlled charging bays
Supported Charger Chemistries:	Compatible Li-ion, LiFePO4, NiMH, and NiCd rechargeable batteries
AC Input:	100-240V AC, 50/60Hz
DC Input:	12V DC
Charger Output Voltage:	4.2V / 3.6V / 1.48V DC
Maximum Charging Current:	425mA per slot with 4 occupied slots or 850mA per slot with 1-2 occupied slots
Charging Method:	Microcomputer-controlled charging appropriate to the selected battery chemistry
Charging Channels:	4 independent charging channels
Charging Indicators:	Individual yellow LED charging-status indicators
LED Status - Charging:	Yellow LED blinking
LED Status - Fully Charged:	Yellow LED steady
LED Status - Error:	Yellow LED blinking rapidly
Charging Termination:	Automatic charge completion detection
Charger Protection:	Reverse-polarity protection and short-circuit protection
Battery Chemistry Selection:	Li-ion / LiFePO4 voltage selector switch
Charger Dimensions:	137 x 97 x 40.5 mm (5.39 x 3.82 x 1.59 in)
Charger Weight:	206 g (7.27 oz), excluding batteries and power cord
Battery Model:	18650 M26
Underlying Cell Model:	INR18650 M26
Underlying Cell Manufacturer:	LG Chem
Battery Size:	18650 cylindrical rechargeable battery
Battery Chemistry:	Lithium-ion (Li-ion), rechargeable
Battery Voltage:	3.6V per cell
Battery Capacity:	2600mAh per cell
Battery Minimum Cell Capacity:	2500mAh per cell
Battery Charging Voltage:	4.2V per cell
Battery Charging Method:	Constant-current / constant-voltage (CC/CV)
Battery Standard Charging Current:	1250mA per cell, underlying M26 cell specification
Battery Maximum Cell Charging Current:	2500mA, underlying M26 cell limit; finished PCB assembly may have a lower limit
Battery Standard Discharge Current:	500mA per cell, underlying M26 cell specification
Battery Discharge Cut-Off Voltage:	2.75V per cell, underlying M26 cell specification
Battery Maximum Cell Discharge Current:	10A, underlying M26 cell limit; finished PCB assembly may have a lower limit
Battery Terminal Configuration:	Button Top (raised positive terminal)
Battery Protection Circuit:	Integrated PCB protection
Battery Protection Functions:	Overcharge, overdischarge, and overcurrent protection; actual PCB thresholds depend on the installed protection circuit
Battery Format:	Protected 18650 lithium-ion rechargeable battery
Battery Nominal Size Designation:	Approximately 65 x 18 mm (2.56 x 0.71 in), standard 18650 cell format
Battery Finished Dimensions:	Depend on the button-top terminal and PCB assembly; verify actual finished length and diameter
Underlying Cell Weight:	Approximately 44 g (1.55 oz), excluding added PCB and terminal modifications
Battery Finished Weight:	Depends on the completed protected battery assembly
Battery Charging Temperature:	0°C to +45°C
Battery Discharging Temperature:	-20°C to +60°C
Battery Memory Effect:	No memory effect
Rechargeable:	Yes
Battery Quantity:	4 x 18650 M26 3.6V 2600mAh protected lithium-ion button-top batteries
Charger Quantity:	1 x Tenergy T4s intelligent universal battery charger
Charger Manufacturer-Listed Accessories:	AC adapter, DC adapter, and user manual; confirm supplied retail package
Package Configuration:	1 charger + 4 protected 18650 M26 button-top lithium-ion rechargeable batteries

Features

Key Features:

• Complete rechargeable battery bundle with one Tenergy T4s charger and four protected 18650 M26 batteries.
• Tenergy T4s intelligent universal four-bay battery charger.
• Charger manufacturer part number: 01432.
• Four independently controlled charging slots.
• Charges up to four compatible rechargeable batteries simultaneously.
• Microcomputer-controlled intelligent charging management.
• Independent charging control for each battery slot.
• Automatic charging completion detection.
• Individual yellow LED charging-status indicators.
• Blinking yellow LED indicates charging.
• Steady yellow LED indicates charging completion.
• Rapidly blinking yellow LED indicates a charging error.
• Supports compatible lithium-ion rechargeable batteries.
• Supports compatible LiFePO4 rechargeable batteries using the correct setting.
• Supports compatible NiMH rechargeable batteries.
• Supports compatible NiCd rechargeable batteries.
• Supports selected cylindrical rechargeable battery sizes.
• Compatible with supported 18650 lithium-ion rechargeable cells.
• Independent charging channels provide flexible battery charging.
• AC 100-240V, 50/60Hz input capability.
• DC 12V input capability.
• Charger output voltages of 4.2V, 3.6V, and 1.48V DC.
• Maximum charging current of 425mA per slot when four slots are occupied.
• Maximum charging current of 850mA per slot when one or two slots are occupied.
• Constant-current and constant-voltage charging management for compatible lithium-ion batteries.
• Reverse-polarity protection.
• Short-circuit protection.
• Li-ion / LiFePO4 voltage selector switch.
• Charger dimensions: 137 x 97 x 40.5 mm (5.39 x 3.82 x 1.59 in).
• Charger weight: 206 g (7.27 oz), excluding batteries and power cord.
• Includes four 18650 M26 lithium-ion rechargeable batteries.
• Battery model: 18650 M26.
• Underlying cell model: INR18650 M26.
• Underlying cell manufacturer: LG Chem.
• Battery voltage: 3.6V per cell.
• Battery capacity: 2600mAh per cell.
• Minimum underlying cell capacity: 2500mAh.
• Rechargeable lithium-ion battery chemistry.
• Cylindrical 18650-format battery construction.
• Raised positive button-top terminal.
• Integrated PCB protection circuit.
• PCB protection designed to help prevent overcharging.
• PCB protection designed to help prevent excessive discharging.
• PCB protection designed to help prevent excessive current draw.
• Protection thresholds depend on the installed PCB design.
• Battery charging voltage: 4.2V per cell.
• Constant-current / constant-voltage (CC/CV) charging method.
• Underlying M26 cell standard charging current: 1250mA.
• Underlying M26 cell maximum charging current: 2500mA.
• Underlying M26 cell standard discharge current: 500mA.
• Underlying M26 cell discharge cut-off voltage: 2.75V.
• Underlying M26 cell maximum discharge current: 10A.
• Finished protected battery current limits may be lower than the underlying cell limits.
• Standard 18650 size designation: approximately 65mm long and 18mm in diameter.
• Actual finished battery length may exceed 65mm because of the button-top terminal and PCB.
• Underlying M26 cell weight: approximately 44 g (1.55 oz).
• Finished protected battery weight depends on the added components.
• Battery charging temperature: 0°C to +45°C.
• Battery discharging temperature: -20°C to +60°C.
• High energy density lithium-ion battery design.
• No memory effect.
• Rechargeable operation for repeated use in compatible equipment.
• Suitable for equipment designed for protected button-top 18650 lithium-ion batteries.
• Suitable for compatible rechargeable flashlights.
• Suitable for compatible portable lighting equipment.
• Suitable for compatible electronic instruments.
• Suitable for properly engineered rechargeable battery applications.
• Charger also supports other specified rechargeable battery formats.
• Verify the finished protected battery dimensions before installation.
• Verify that the device requires or accepts a raised positive button-top terminal.
• Verify the equipment's permitted continuous discharge current.
• Do not exceed the lower of the underlying cell or protection PCB current limits.
• Do not bypass or remove the integrated PCB protection circuit.
• Do not substitute these batteries for 1.5V AA or AAA batteries.
• Do not substitute these batteries for 3.2V LiFePO4 batteries.
• Do not substitute these batteries for nonrechargeable lithium batteries.
• Never charge primary alkaline, zinc-carbon, or primary lithium batteries.
• Do not use the incorrect charger chemistry or voltage setting.
• Do not short-circuit, puncture, crush, overheat, or disassemble lithium-ion batteries.
• Do not charge or use damaged, leaking, swollen, or excessively hot batteries.
• Follow the Tenergy charger manual and applicable lithium-ion battery safety instructions.

COMPATIBILITY

Common Applications:

• Charging 18650 M26 3.6V 2600mAh protected lithium-ion batteries
• Charging compatible 18650 lithium-ion rechargeable button-top batteries
• Charging compatible protected 18650 lithium-ion batteries
• Charging compatible 26650 lithium-ion rechargeable batteries
• Charging compatible 22650 lithium-ion rechargeable batteries
• Charging compatible 17670 lithium-ion rechargeable batteries
• Charging compatible 18490 lithium-ion rechargeable batteries
• Charging compatible 17500 lithium-ion rechargeable batteries
• Charging compatible 17335 lithium-ion rechargeable batteries
• Charging compatible 14500 lithium-ion rechargeable batteries
• Charging compatible 10440 lithium-ion rechargeable batteries according to charger instructions
• Charging compatible 16340 lithium-ion rechargeable batteries
• Charging compatible LiFePO4 rechargeable batteries with the correct voltage setting
• Charging compatible AA NiMH rechargeable batteries
• Charging compatible AAA NiMH rechargeable batteries according to charger instructions
• Charging compatible C NiMH rechargeable batteries
• Charging compatible Sub-C NiMH rechargeable batteries
• Charging compatible AA NiCd rechargeable batteries
• Charging compatible AAA NiCd rechargeable batteries according to charger instructions
• Charging compatible C NiCd rechargeable batteries
• Charging compatible Sub-C NiCd rechargeable batteries
• Compatible flashlights requiring protected button-top 18650 lithium-ion batteries
• Compatible rechargeable LED lighting equipment
• Compatible portable electronic instruments
• Compatible rechargeable electronic devices
• Equipment designed for protected 18650 lithium-ion battery assemblies

Also Known As / Replaces:

• Tenergy T4s Intelligent Universal Battery Charger
• Tenergy T4s Charger
• Tenergy T4S Intelligent Charger
• Tenergy T4s Four-Bay Battery Charger
• Tenergy T4s Universal Rechargeable Battery Charger
• Tenergy T4s Multi-Chemistry Battery Charger
• Tenergy T4s Lithium-Ion Battery Charger
• Tenergy T4s Charger Model 01432
• 18650 M26 Lithium-Ion Battery
• INR18650 M26 Lithium-Ion Cell
• LG Chem INR18650 M26 Cell
• 18650 M26 3.6V Rechargeable Battery
• 18650 M26 2600mAh Lithium-Ion Battery
• 18650 M26 Button Top Battery
• 18650 M26 Protected Lithium-Ion Battery
• 18650 M26 Button Top with PCB
• 18650 3.6V 2600mAh Protected Battery
• 18650 2600mAh Lithium-Ion Rechargeable Battery
• 18650 3.6V Lithium-Ion Button Top Battery
• 18650 Lithium-Ion Battery with PCB Protection
• Tenergy T4s and M26 18650 Battery Bundle
• Tenergy T4s Charger with Four Protected M26 Batteries

Important Compatibility Note:

• CHARGER BRAND: Tenergy.
• CHARGER MODEL: T4s.
• CHARGER PART NUMBER: 01432.
• CHARGER TYPE: Intelligent universal rechargeable battery charger.
• CHARGING SLOTS: Four independently controlled charging bays.
• SUPPORTED CHARGER CHEMISTRIES: Compatible Li-ion, LiFePO4, NiMH, and NiCd rechargeable batteries.
• CHARGER INPUT: AC 100-240V, 50/60Hz or DC 12V.
• CHARGER OUTPUT VOLTAGE: 4.2V, 3.6V, or 1.48V DC.
• MAXIMUM CHARGING CURRENT: 425mA per slot with four occupied slots or 850mA per slot with one or two occupied slots.
• CHARGER DIMENSIONS: 137 x 97 x 40.5 mm (5.39 x 3.82 x 1.59 in).
• CHARGER WEIGHT: 206 g (7.27 oz), excluding batteries and power cord.
• CHARGER LED INDICATORS: Yellow blinking means charging; yellow steady means fully charged; yellow blinking rapidly means error.
• CHARGER PROTECTION: Reverse-polarity protection and short-circuit protection.
• BATTERY MODEL: 18650 M26.
• UNDERLYING CELL MODEL: INR18650 M26.
• UNDERLYING CELL MANUFACTURER: LG Chem.
• BATTERY SIZE: 18650 cylindrical rechargeable battery.
• BATTERY CHEMISTRY: Lithium-ion (Li-ion), rechargeable.
• BATTERY VOLTAGE: 3.6V per cell.
• BATTERY CAPACITY: 2600mAh per cell.
• BATTERY MINIMUM CELL CAPACITY: 2500mAh per cell.
• BATTERY CHARGING VOLTAGE: 4.2V per cell.
• BATTERY CHARGING METHOD: Constant-current / constant-voltage (CC/CV).
• BATTERY STANDARD CHARGING CURRENT: 1250mA per cell, underlying M26 cell specification.
• BATTERY MAXIMUM CELL CHARGING CURRENT: 2500mA, subject to the finished PCB assembly's lower limit if applicable.
• BATTERY STANDARD DISCHARGE CURRENT: 500mA per cell, underlying M26 cell specification.
• BATTERY DISCHARGE CUT-OFF VOLTAGE: 2.75V per cell, underlying M26 cell specification.
• BATTERY MAXIMUM CELL DISCHARGE CURRENT: 10A, subject to the finished PCB assembly's lower limit if applicable.
• BATTERY TERMINAL CONFIGURATION: Button Top (raised positive terminal).
• BATTERY PROTECTION CIRCUIT: Integrated PCB protection.
• BATTERY PROTECTION FUNCTIONS: Overcharge, overdischarge, and overcurrent protection; actual thresholds depend on the installed PCB.
• BATTERY NOMINAL SIZE DESIGNATION: Approximately 65 x 18 mm (2.56 x 0.71 in), standard 18650 cell format.
• BATTERY FINISHED DIMENSIONS: Depend on the added button-top terminal and PCB protection assembly.
• UNDERLYING CELL WEIGHT: Approximately 44 g (1.55 oz), excluding added PCB and terminal components.
• BATTERY FINISHED WEIGHT: Depends on the completed protected battery assembly.
• BATTERY CHARGING TEMPERATURE: 0°C to +45°C.
• BATTERY DISCHARGING TEMPERATURE: -20°C to +60°C.
• BATTERY QUANTITY: Four 18650 M26 3.6V 2600mAh protected lithium-ion button-top batteries.
• CHARGER QUANTITY: One Tenergy T4s intelligent universal battery charger.
• VOLTAGE COMPATIBILITY: The included batteries are 3.6V lithium-ion rechargeable cells.
• CHARGING VOLTAGE WARNING: Use the correct 4.2V lithium-ion charging mode, not the 3.6V LiFePO4 charger output.
• CHEMISTRY SELECTION: Select the correct lithium-ion charging setting for the included M26 batteries.
• LiFePO4 WARNING: Do not use the LiFePO4 charging setting for these 3.6V lithium-ion cells.
• BUTTON TOP COMPATIBILITY: The raised positive terminal must match the equipment's battery contact design.
• PHYSICAL FIT: Protected button-top 18650 batteries may be longer than standard unprotected 18650 cells.
• CHARGER FIT: Confirm the finished protected battery fits securely in the Tenergy T4s charging bay without excessive force.
• PCB PROTECTION: The included batteries feature an integrated protection circuit.
• PCB LIMITS: Protection thresholds and maximum current capability depend on the installed PCB design.
• DISCHARGE CURRENT LIMIT: Do not exceed the lower of the M26 cell limit and the installed PCB's permitted current.
• DISCHARGE CUT-OFF: The underlying M26 cell specification uses a 2.75V discharge cut-off; the PCB may disconnect at a different threshold.
• DEVICE COMPATIBILITY: Use only in equipment designed for the supplied battery voltage, chemistry, terminal style, dimensions, and electrical limits.
• AA/AAA WARNING: These 18650 lithium-ion batteries are not replacements for 1.5V AA or AAA batteries.
• PRIMARY LITHIUM WARNING: These rechargeable batteries are not replacements for nonrechargeable lithium batteries.
• CHARGER RESTRICTION: Use the Tenergy T4s only with supported rechargeable battery chemistries.
• SMALL-CELL CHARGING WARNING: Never charge a single AAA or 10440 battery alone in the T4s; follow the manufacturer's paired-slot instructions.
• CHARGING TIME: Actual charging time depends on battery condition, state of charge, charging current, and occupied charging slots.
• BATTERY CONDITION: Never charge or use damaged, swollen, leaking, overheated, or otherwise compromised lithium-ion batteries.
• POLARITY: Observe the positive and negative markings on the batteries and charger.
• SHORT-CIRCUIT WARNING: Keep loose lithium-ion battery terminals away from conductive objects.
• HANDLING: Do not puncture, crush, disassemble, short-circuit, or expose lithium-ion batteries to excessive heat.
• STORAGE: Protect loose lithium-ion battery terminals against accidental contact with metal objects.
• BATTERY PACK ASSEMBLY: Multi-cell lithium-ion packs require suitable electrical design, cell matching, and battery-management protection.
• REPLACEMENT: Match voltage, chemistry, dimensions, button-top configuration, discharge-current capability, and PCB protection requirements before replacing an existing battery.
• MANUFACTURER INSTRUCTIONS: Follow the Tenergy T4s charger manual and applicable M26 cell and protected battery assembly safety specifications.

Package Includes:

• 1 x Tenergy T4s Intelligent Universal 4-Bay Battery Charger
• 4 x 18650 M26 3.6V 2600mAh Lithium-Ion Rechargeable Batteries (Button Top + PCB Protection)
• 1 x AC Adapter (manufacturer-listed charger accessory; confirm supplied package)
• 1 x DC Adapter (manufacturer-listed charger accessory; confirm supplied package)
• 1 x User Manual (manufacturer-listed charger accessory; confirm supplied package)
• No additional batteries or equipment included unless specifically stated in the product offer