Features:
Smart and Security: Both battery and charger with built-in Protection of over-charge, over-discharge, short-Circuit, reverse polarity, and over-heated, to protect the battery safety charged.

TIPS:！DON'T USE THE CHARGER CHARGE ANY OTHER BRAND BATTERY, CHARGE KEENSTONE 9V RECHARGEABLE LI-ION BATTERY ONLY.！

Don't use the battery in TAYLOR GUITAR, Taylor guitar need a battery thinner than the standard size battery. 

Capacity: 800mAh
Voltage: 9V
Chemistry: Li-ion
Size:48.44*25.5*16.2mm / 1.9*0.98*0.63in
Life Cycles: >500 cycles life
Working Temperature: -20℃-60℃/ -4℉-140℉

Package
6 x Keenstone 9V Li-ion rechargeable battery
1 x Keenstone 3 bay battery charger
1 x USB Cable
1 x user manual