1. voltage: 3.7v
2. capacity: 3500mah (or OEM)
3. size: 18*65mm (or OEM)
4. type: 18650 3500mah
3.7v 3500mAh 18650 Li-ion Battery Pack
3.7v nominal voltage li ion battery pack, with the highest 18650 capacity 3500mAh, rechargeable with USB multiple function charger.
capacity: 3500mah max
protection: yes, protect from over-charge, over-discharge,over-current
for 14500 18650 26650, 32650 etc.
for li-ion battery pack, LiFepo4 battery pack, Ni-Cd battery pack, Ni-mh battery pack etc.