For most Tokyo Marui, TSD, Well, Galaxy and other compatible R4 / MP-7 series Airsoft AEG.
Use it in Tokyo Marui(TM) Glock 18C.
It's ni-mh which means you can recharge from any mah remaining which to be a spare.
Take about 2-3 hours to charge depending on how dead it is, so charging one and using the other half-sparingly can quite litterally keep you running one dry while the other finishes charging full.
Grab this battery and add extra shooting capacity on your next skirmish.
Nominal Voltage : 7.2v
Capacity : 450mAh
Over All Size : 95mm x 30mm x 15mm
Major Color : Black
Weight with Package: 82g
Manufacturer : COOL