CM16 Predator G&G battery help

[Zimm]

Hello, first I'm sorry if I write something wrong in English, I'm from Brazil and I'm using the translator to write this message.
A week ago I bought an AEG cm16 predator from g & g, on the first day I put an evo lipo 7.4 20c battery and it worked normally, but when I tried to shoot on the second day, it just didn't work, it just made the noise as if trying to shoot, if I put it in auto / full it only gave 2 shots at most.
Using the original battery that comes in box 9.6 the AEG works ...
I also tested it with the batteries of some friends, it happens that the 7.4 battery does not fire, with 11.1 lipo battery it fires normally, is this a problem?
Should I send it back to the store?

 

[Steveocee]

Not a problem. G&G ETU's recommend an 11.1v battery. There is a voltage cutoff which your 7.4s are dropping below when not fully charged which is causing you the problem.

Buy 11.1v and you'll be fine.

"PLEASE NOTE: Due to MOSFET system on the CM16 the weapon is only compatible with 11.1v batteries."

https://www.patrolbase.co.uk/g-and-g-armament-gc16-intermediate-series-predator