The 9.6v 1100mAh UMG Custom Battery is designed to fit in the confined space of the UMG body. Due to its voltage and higher output this battery will increase the rate of fire and the length of play of the UMG over other standard stick batteries. This battery is a must if you want to upgrade your stock UMG.
To fit this battery may require some slight modification to your AEG. Nickel-cadmium batteries must be discharged before they are recharged, failure to do so will result in damaged battery cells.
Airsoft GI Battery Disclaimer:
Airsoft GI is not responsible for batteries that have been damaged as a result of improper operation, storage, misuse or abuse, accident or neglect, such as physical damage resulting from misuse; contact with liquid, water, rain, extreme humidity or heavy perspiration, sand, dirt or the like, extreme heat, or food; use of the battery for commercial purposes or subjecting the battery to abnormal usage conditions, or other acts which are not the fault of Airsoft GI. Make sure you understand how your battery should be used and how long it should be charged. If you have any doubt regarding the operation, charging, or storage of your battery and/or charger, ask. A charging battery should not be left unattended and should be picked up periodically while charging to check for overheating. Do not charge batteries near flammable material. For more information regarding batteries please refer to the Frequently Asked Questions or the Airsoft GI Airsoft 101 Guide.