Skip to product information
1 of 1

Li-ion 4400mAh 3.7v battery

Regular price £8.74 GBP
Regular price Sale price £8.74 GBP
Sale Sold out

Lithium Ion rechargeable batteries are perfect for giving extra power to projects due to their high current capability and ability to be recharged many times without suffering the memory effect of traditional NiMH and NiCad batteries.

Being very light and small, they can still output up to 4.2v with the nominal voltage of 3.7v which is more than enough for any 3.3-5v micro controllers such as the Adafruit Flora.

Use only a dedicated LiPoly charger for charging these batteries to protect from accidental explosion or fires! A charger for this battery is available here. Do not use a NiMH, NiCad or Lead Acid charger with Li-Ion or LiPoly batteries.

Features 2 pin JST connector

Initial Capacity 4400mAh
Nominal Voltage 3.7v
Max Charge Voltage 4.2v
Min Discharge Cut Off 2.75v
Standard Charge 0.2C mA (880mA)
Fast Charge Current 0.5C mA (2200mA max)
Fast Discharge 0.6C mA (2500mA max)
Connector JST-PHR-2P
Size 37 x 67 x 20mm (WxLxH)
Wire Length 80 +/-3mm
Weight 100g
Operating Temperature -40c - +85c
Storage Temperature -40c - +125c


These batteries do not have a hard protective case. You should take care when housing the batteries to ensure they have sufficient mechanical protection to protect the battery from any possible damage. If a battery does become damaged (dented, bent, etc) then it should not be used.

The included protection circuitry keeps the battery voltage from going too high (over-charging) or low (over-use) which means that the battery will cut-out when completely dead at 3.0V. It will also protect against output shorts.