Tangsfire 3.7V Rechargeable Flat Top Battery IMR 4000mAh Li-ion 60A High Drain Batteries (2 Pack)

Style: Flat Top

Chemistry: IMR

Nominal capacity: 4000 mAh (Max)

Max Continuous Rated Discharge: 40A & Rated 60A Max Pulse

Dimensions: 70.80 mm (L) (Max) x 21.30 mm (D) (Max)

Weight: 67.7g (Max)

Discharge Cut-off Voltage: 2.5V

Nominal voltage: 3.6~3.7V

Full Charge Voltage: 4.2V ± 0.05V

Cycle info: Capacity drops to 60% after 250 full charge/discharge Cycles

Standard Charge: Constant Current 4000mA, Constant Voltage 4.2V, & Cut-Off 100mA

Operational Charging Temperature Range: 0 to 70 degrees Celsius (best below 70 degrees Celsius)

Operational Discharging Temperature Range: -20 to 70 degrees Celsius (best below 70 degrees Celsius)

Package Include: 2 x Tangsfire 21700 batteries


Tips:

1.Charge Fully (to 4.2V) before first use. Never completely discharge battery (below 2.5V under load or 3.0V unloaded)

2. Never charge the battery up to 4.3V or above. Use only proper battery chargers that’s designed for 21700 type of battery

3. Do not connect the positive contact to the negative contact without an appropriate load
Do not keep your li-ion batteries fully charged for an extended period of time (more than weeks)

4. If you must store the battery then leave it in a proper case / box in a cool & dry place at around 3.6V to 3.7V
Do not expose to heat / sunlight. Never keep a spare battery loose in a pocket, purse, backpack, or etc.

5.Never try to charge or discharge li-ion battery with battery charger that is not made for Li-ion battery

Battery maintenance tips: Do not use the battery in a product that exceeds the maximum discharge current of the battery itself. Doing so may seriously injure the battery life.

• Capacity: 4000mAh (MAX), Continuous Rated Discharge: 40A (MAX), Rated 60A (MAX) Pulse, & Nominal Voltage: 3.6V-3.7V.
• Fully Charged to 4.2V Before First Use & Use Only Proper Battery Charger That's Designed for 21700 Type Battery.
• Capacity Drops to 60% After 250 Full Charge/Discharge Cycles & Must Store the Battery in a Proper Case/Box in a Cool & Dry Place.
• Ideal for Device That Requires Removable Flat Top 21700 Size Battery, Chemistry: IMR, Size: 21700, Style: Flat Top, Type: Lithium-ion.
• 100% Brand New Batteries Package include: 2 * 21700 battery.