Description

Tenergy T4s Intelligent Universal Battery Charger + 4 x Panasonic 18650 3.7V 3400mAh Lithium-Ion Rechargeable Batteries (Button Top + PCB Protection) combines a versatile four-bay intelligent rechargeable battery charger with four high-capacity Panasonic 18650 lithium-ion rechargeable batteries. Each included battery is listed at 3.7V with a 3400mAh capacity designation and features a raised positive button-top terminal and integrated PCB protection circuitry. This convenient charger and battery bundle provides a practical rechargeable power solution for compatible flashlights, portable lighting equipment, electronic instruments, and other devices designed for protected 18650 lithium-ion batteries.

The Tenergy T4s Intelligent Universal Battery Charger features four independently controlled charging slots, allowing 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 Panasonic NCR18650B 3.7V 3400mAh lithium-ion rechargeable batteries with button-top terminals and PCB protection. The underlying Panasonic NCR18650B cell has a typical capacity of 3350mAh, minimum capacity of 3250mAh under specified conditions, 4.2V charging voltage, 1625mA standard charging current, and 2.5V discharge cut-off voltage. The original cell is approximately 65.3mm long and 18.5mm in diameter before the addition of a button-top terminal and PCB protection assembly. The finished protected battery may be longer than a standard unprotected 18650 cell, and its allowable current and protection thresholds depend on the installed PCB. Before installation, verify the equipment's voltage, battery compartment dimensions, button-top contact requirements, and discharge-current limits. These rechargeable lithium-ion 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 Panasonic 18650 3.7V 3400mAh Lithium-Ion Batteries (Button Top + PCB Protection)
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:	3.7V Li-ion / 3.2V LiFePO4 battery type selector
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 Brand:	Panasonic
Battery Model:	NCR18650B
Battery Size:	18650 cylindrical rechargeable battery
Battery Chemistry:	Lithium-ion (Li-ion), rechargeable
Battery Voltage:	3.7V per battery
Battery Capacity:	3400mAh per battery
Underlying Cell Typical Capacity:	3350mAh under specified test conditions
Underlying Cell Minimum Capacity:	3250mAh under specified test conditions
Battery Charging Voltage:	4.2V per battery
Battery Charging Method:	Constant-current / constant-voltage (CC/CV)
Underlying Cell Standard Charging Current:	1625mA
Underlying Cell Standard Charging Time:	Approximately 4 hours under specified standard charging conditions
Underlying Cell Discharge Cut-Off Voltage:	2.5V
Underlying Cell Maximum Continuous Discharge Current:	4.875A under specified conditions; 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; exact functions and thresholds depend on the installed PCB
Battery Format:	Protected 18650 lithium-ion rechargeable battery
Underlying Cell Length:	Approximately 65.3 mm (2.57 in)
Underlying Cell Diameter:	Approximately 18.5 mm (0.73 in)
Battery Finished Dimensions:	Depend on the button-top terminal and PCB assembly; verify actual finished length and diameter
Underlying Cell Weight:	Approximately 48.5 g maximum
Battery Finished Weight:	Depends on the completed protected battery assembly
Battery Charging Temperature:	0°C to +45°C, underlying cell specification
Battery Discharging Temperature:	-20°C to +60°C, underlying cell specification
Battery Memory Effect:	No memory effect
Rechargeable:	Yes
Battery Quantity:	4 x Panasonic 18650 3.7V 3400mAh lithium-ion rechargeable batteries (Button Top + PCB Protection)
Charger Quantity:	1 x Tenergy T4s intelligent universal battery charger
Charger Manufacturer-Listed Accessories:	AC adapter, DC adapter, and user manual
Package Configuration:	1 charger + 4 Panasonic protected button-top 18650 lithium-ion rechargeable batteries

Features

Key Features:

• Complete rechargeable battery bundle with one Tenergy T4s charger and four Panasonic protected 18650 lithium-ion 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 multiple cylindrical rechargeable battery sizes.
• Compatible with supported 18650 lithium-ion rechargeable batteries.
• 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.
• 3.7V Li-ion / 3.2V LiFePO4 battery type selector.
• 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 Panasonic NCR18650B lithium-ion rechargeable batteries.
• Battery brand: Panasonic.
• Battery model: NCR18650B.
• Battery voltage: 3.7V per battery.
• Battery capacity: 3400mAh per battery.
• Underlying Panasonic cell typical capacity: 3350mAh under specified conditions.
• Underlying Panasonic cell minimum capacity: 3250mAh under specified conditions.
• Rechargeable lithium-ion battery chemistry.
• Cylindrical 18650-format battery construction.
• Raised positive button-top terminal.
• Integrated PCB protection circuit.
• PCB protection helps manage overcharging conditions.
• PCB protection helps manage excessive discharging.
• PCB protection helps manage excessive current draw.
• Protection thresholds depend on the installed PCB design.
• Battery charging voltage: 4.2V per battery.
• Constant-current / constant-voltage (CC/CV) charging method.
• Underlying Panasonic cell standard charging current: 1625mA.
• Underlying Panasonic cell standard charging time: approximately 4 hours under specified conditions.
• Underlying Panasonic cell discharge cut-off voltage: 2.5V.
• Underlying Panasonic cell maximum continuous discharge current: 4.875A under specified conditions.
• Finished protected battery current limits may be lower than the underlying cell limits.
• Underlying cell length: approximately 65.3mm (2.57 in).
• Underlying cell diameter: approximately 18.5mm (0.73 in).
• Actual finished battery length may exceed the standard 18650 dimensions because of the button-top terminal and PCB.
• Finished protected battery weight depends on the added protection components.
• Battery charging temperature: 0°C to +45°C.
• Battery discharging temperature: -20°C to +60°C.
• High energy density lithium-ion battery construction.
• 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 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 Panasonic lithium-ion battery safety instructions.

COMPATIBILITY

Common Applications:

• Charging Panasonic NCR18650B 3.7V 3400mAh protected lithium-ion batteries
• Charging compatible 18650 lithium-ion rechargeable button-top batteries
• Charging compatible protected 18650 lithium-ion rechargeable 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
• Panasonic NCR18650B Lithium-Ion Battery
• Panasonic 18650 3.7V Rechargeable Battery
• Panasonic 18650 3400mAh Lithium-Ion Battery
• Panasonic NCR18650B 3400mAh Battery
• Panasonic 18650 Button Top Battery
• Panasonic 18650 Protected Lithium-Ion Battery
• Panasonic 18650 Button Top with PCB
• Panasonic NCR18650B Protected Button Top Battery
• 18650 3.7V 3400mAh Protected Battery
• 18650 3400mAh Lithium-Ion Rechargeable Battery
• 18650 3.7V Lithium-Ion Button Top Battery
• 18650 Lithium-Ion Battery with PCB Protection
• Tenergy T4s and Panasonic 18650 Battery Bundle
• Tenergy T4s Charger with Four Panasonic 18650 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 BRAND: Panasonic.
• BATTERY MODEL: NCR18650B.
• BATTERY SIZE: 18650 cylindrical rechargeable battery.
• BATTERY CHEMISTRY: Lithium-ion (Li-ion), rechargeable.
• BATTERY VOLTAGE: 3.7V per battery.
• BATTERY CAPACITY: 3400mAh per battery.
• UNDERLYING CELL TYPICAL CAPACITY: 3350mAh under specified test conditions.
• UNDERLYING CELL MINIMUM CAPACITY: 3250mAh under specified test conditions.
• BATTERY CHARGING VOLTAGE: 4.2V per battery.
• BATTERY CHARGING METHOD: Constant-current / constant-voltage (CC/CV).
• UNDERLYING CELL STANDARD CHARGING CURRENT: 1625mA.
• UNDERLYING CELL STANDARD CHARGING TIME: Approximately 4 hours under specified conditions.
• UNDERLYING CELL DISCHARGE CUT-OFF VOLTAGE: 2.5V.
• UNDERLYING CELL MAXIMUM CONTINUOUS DISCHARGE CURRENT: 4.875A under specified conditions; 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 thresholds depend on the installed PCB.
• UNDERLYING CELL LENGTH: Approximately 65.3mm (2.57 in).
• UNDERLYING CELL DIAMETER: Approximately 18.5mm (0.73 in).
• BATTERY FINISHED DIMENSIONS: Depend on the button-top terminal and PCB protection assembly.
• UNDERLYING CELL WEIGHT: Approximately 48.5g maximum.
• 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 Panasonic 18650 3.7V 3400mAh protected lithium-ion button-top batteries.
• CHARGER QUANTITY: One Tenergy T4s intelligent universal battery charger.
• VOLTAGE COMPATIBILITY: The included batteries are listed as 3.7V lithium-ion rechargeable batteries.
• CHARGING VOLTAGE WARNING: Use the correct 4.2V lithium-ion charging mode, not the 3.6V LiFePO4 charger output.
• CHEMISTRY SELECTION: Select the 3.7V lithium-ion charging setting for the included Panasonic batteries.
• LiFePO4 WARNING: Do not use the 3.2V LiFePO4 charging setting for these Panasonic lithium-ion batteries.
• 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 batteries fit securely in the Tenergy T4s charging bays 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 Panasonic cell limit and the installed PCB's permitted current.
• DISCHARGE CUT-OFF: The underlying Panasonic cell specification uses a 2.5V discharge cut-off; the PCB may disconnect at a higher 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 Panasonic cell and protected battery assembly safety specifications.

Package Includes:

• 1 x Tenergy T4s Intelligent Universal 4-Bay Battery Charger
• 4 x Panasonic 18650 3.7V 3400mAh Lithium-Ion Rechargeable Batteries (Button Top + PCB Protection)
• 1 x AC Adapter (manufacturer-listed charger accessory)
• 1 x DC Adapter (manufacturer-listed charger accessory)
• 1 x User Manual (manufacturer-listed charger accessory)
• No additional batteries or equipment included unless specifically stated in the product offer