Matrix High Performance 7.4V Stick Type Airsoft LiPo Battery (Configuration: 1000mAh / 20C / Deans & Long Wire)

"Very Reliable Batteries! Good For Beginners Too!

"Fits my MP5ks, not a lot of batteries do.

"charges quickly enough, holds well when not in use but i be sure to keep them topped off. fit in my rifles well enough

"Love it I use it in my Mp5 which has a small hand space
No problems at all but serious note get a good charger so they last longer and don’t catch your house on. Fire lols

"Use the 1200 stick. Fits in both my E&L AK74 and Arcturus AK12 (with a deans connector). Works well and lasts several hours satisfactory.

"Small enough to fit in the handguard of an MP5 SD6, and reliable too.

"so far the only battery i found that able to fit inside arcturus ak12

"Battery lasted all day. Fits in my buffertube. Charger combo is extremely portable.

"Works great on my emg sharp bros hell breaker

"Small, fit perfectly on my m4 buffer tube! Would recommend.!

"I thought it was a great battery. I mean it’s a battery so I don’t have much to say but I would recommend it.

"Long battery life. Overall champion battery!

"Great battery. Fits nicely into my AK74U's upper receiver.

"Battery works great, more snappy response than a 9.6v NiMh. This battery also fits in an m4 handguard.

"fit into the stock perfectly and has pretty good charge to it.