Matrix High Performance 11.1V Brick Type Airsoft LiPo Battery (Model: 4000mAh - 25C / Large Tamiya)

"I have had this battery pack for about a year and a half, play on average twice a month, and have only recharged it twice...that being said, I do shoot very conservatively but that is still a heck of a long time to hold a charge. On the days I play, it's either pulling the M130 spring in my primary, the M120 in my secondary, or either of the M150's in my DMR's. General trigger response and ROF (especially with the M120 spring) are completely insane! Many of the guys and gals on my team (sogairsoft.org) use the same battery and have had similar good results. Great buy, just make sure your gearbox and wiring can take the extra power...if so, you'll never use another battery again (except for those below-freezing winter days when a lower voltage battery can save your gearbox from cracking). So good that I'm buying another one soon!

"Got 2 for my m4, worked great for the first 2 months until one broke. It's been a year now and the 2nd one decided not to leave the gun. Overall they are really good and last a long time and if it wasn't for the one breaking it would definitely be a 5 star rating.

"im just wondering what is the best charger to use for it? I know i need a smart/balanced charger. is their one what measures it?

"I got this battery for my krytac MK2 and it fits in the buffer tube as advertised. The fit is a bit tight with the wiring and it might take you a few minutes to get a good fit. It is also pretty much impossible to set the stock at number 1 but 2-6 is perfectly fine for me.

Pros:
Fits in my krytac MK2 Trident buffer tube

Cons:
Can be a bit cumbersome to fit the battery and wiring together inside the buffer tube

"Great LiPo, amazing rate of fire. Bumped my 22 RPS gun to 28 RPS, great for pulling high FPS springs or for just a high rate of fire set up. Great discharge rate of 40C makes for a ridiculously fast set up. I wouldn't recommended this for anyone using a low reinforcement gun or piston, as you would run a high risk of stripping the piston.

"had it for a day. I'm on the field and my gun stops shooting. I think "okay, I'm running low on battery" so I decide to pull it out and charge it. When I pull out the battery the negative cord had broken off. The sawdering point was so flimsy that it had melted under the pressure of my gun shooting. As of now I have had to buy a new battery because it costs more for an RMA than to just buy a new battery.

"Bought two of these batteries. Both are useless now they both “puffed out” after 2 uses. The matrix brand is not good, great price as they are inexpensive. You get what you pay for.