Matrix Battle Axe Replacement Battery for Electric Winding Drum / Dual Airsoft Magazines (Model: SMP Connector)

"Very good battery! charge 3-4 hrs, have not recharged in about 4 -5hrs of solid play.Bought an extra for my matrix 800rd mag. i dont even have to use it.

"I use one of these in my 1000rd battle axe auto winding mag, and it is fantastic, i have had it for over a year and have not had any issues, this doesnt take too long to charge, but if you over charge it you will fry it, only charge it for about 2-3 hours, but it does last forever

"These are good batteries for the price. I honestly can't argue with that. On a full charge, mine ran about a little over an hour in my 1300 round dual mag. Since I don't own a SAW of any kind, I really got my taste through the dual mag. I will leave a fair warning that I have only had this battery for a few months and it's already corroding. Possible safety hazard and it is also annoying to charge since mine didn't come with a manual when I got the dual mag. I would guess a fair charge is around 4 hours. I let mine charge over night, which might have accelerated the corrosion rate... Don't know...

Pros:
Good lengthy life span for my dual mag, (usually no ammo by the time it dies)
Goes for both SAWs and Auto-winding rifle super caps
Cheap for it's quality
Strong charge for fast and efficient winding. Never misfed once

Cons:
Corrodes quick as heck (barely made 3 months on my first)
LOOOOOOOOOOOOONG charge time... Grrrr
No smart charger that I know of so this accompanies the charge con... Some more grrrrrrrr

That's really it. Good buy for your SAW mags and Dual whatever mags (M4, AK, G36, whatever) Get it!