For: (Discontinued) UTG 8.4v 1100mAh NiMH Mini BatteryProduct Information:
I got this with my echo 1 m4. I have played maybe 5 times since i got it. The charge only lasts me 4-5 300 rd mags. i have over charged this battery mabey twice luckly without consequence. overall decent battery.
small fits well in my m4
charges in 10minutes with my speed charger
short battery life
gets really HOT!!!