The battery is charged in my home. I use the oven timer for 4 hrs lol. My garage is heated to 10C . The mags are 230 rnds so possibly shot 8800 bbs.
this is the gun.
http://torontoairsoft.com/product.php?id_product=980
Battery is a nunchuk ni-mh 2/3A 1200mAh 8.4V
But the smart charger is a good idea. I'm just not sure what to look for. but the convenience of just being able to plug it in and walk away.