2200 mah 3.7V Rechargeable Lithium ion Battery Power Bank Cell (Pack of 1)

Do not use a NiMH/NiCad/lead-acid charger! Also, do not abuse these batteries, do not short, bend, crush or puncture. Never charge or use unattended. Always inspect batteries and surrounding circuitry constantly for any damage, loose wiring, or the possibility of short circuits. As with all Lithium-ion polymer batteries and with any power source – they should be used by experts who are comfortable working with power supplies