... and stableHigh-tech lithium battery, undergoes drop test, smash test and acupuncture test to ensure no fire and explosion in breakingQCBefore fixing, each ... . 5. To prevent short circuit, never put it together with conductors, such as keys, coins, etc.6. Keep the battery in a cool ... dry surrounding if it's standby. Factory tour: Lithium mobile phone battery for BP-4L