MP5A5/SD6 (folding stocks)

[joker, the frickin ninja]

What would bee the biggest battery I would be able to fit into an MP5A5 or SD6 foregrip without modifications?

[Gryphon]

Generally a 9.6V 2/3A 1400mAh made out of Intellect cells. The SD handguard is tight and I have no experience with it, though I know a CA MP5 wide forearm will accept a 9.6V no problem. Unless you have the tactical flashlight built in, in which case you're stuck with 8.4V.

[joker, the frickin ninja]

What would be the biggest 8.4 volt battery? I am still a bit of a newb, so i dont know everything, but generally 8.4 volts are smaller than 9.6ers. I dont care about ROF just whatever lasts the longest. If I can get some around or greater than 1100 or 1200 mah, I'll stick with a folding stock for compactness. I'd rather have an SD because of looks, but I could easily go with the A series as well (especially with the ICS laser that fits into ICS A-series front nozzle, which is a huge plus for me).

[Gryphon]

Yes, that's a very nice feature that I wish some other manufacturers had followed up with.

Like I said above, currently the highest capacity 2/3A cell is the Intellect 1400 mAh NiMH. http://www.cheapbatterypacks.com builds good packs for very reasonable prices but last time I looked they were out of stock on the 1400s.

[BC_K]

I've fit a 9.6v 1700mah Butterfly battery into the grip on my friends MP5SD2. Yes I'm aware its a full stock gun, but its great for carrying two batteries.

[CDN_Stalker]

My MP5 started life as an A5, fitting an 8.4V 600mAh was tricky because you had to latch the rear of the handguard, then raise it up and pin it at the front. Then I installed an SD front end, found there was quite a bit (within reason) more room in there than the A5, and was much easier to install/remove the battery (especially with stashing wire, connectors and fuseholder). So, prefering the SD front end, you open up the size of batteries more (still going to be less than 2000mAh though.)

FYI, when my MP5 was stock, I'd get 1000-1100 rounds off on one 600mAh battery. When I upgraded with a 150% spring, the rate of fire and enduance went down a lot, would get about 400rds out before having to swap batteries. So a higher mAh battery will net you a higher rate of fire (motor isn't as limited to the amount of current it can draw), and will last longer.

[Prowler]

Originally Posted by BC_K

...a 9.6v 1700mah Butterfly battery into the grip on my friends MP5SD2. Yes I'm aware its a full stock gun, but its great for carrying two batteries.

My hand cover required modification to fully fit the 1700mah. It would push it out about 1/4 of an inch from the side. Not tested for non CA guns. There would be no way to wire two batteries from within the body. Also note I had to dremel holes in the outer body to fit the thicker wiring to the front.

Also, CA guns don't seem to be wired for 9.6v batteries and show signs of overheating. Stick to what works unless your brave enough to fry your gun. Mine was already broken to begin with. I highly recomend sticking to what works...