Smart Battery

electric airsoft gun or gas airsoft gun?
im about to buy a very expensive airsoft gun and i saw that they have it for both electirc and gas powered and the fps is about the same but which is more reliable? i own many airsoft guns and it seems that the batterys on the electric ones get worse or break down but i read about a smart charger for airsoft batterys. so should i get the electric powered one with the smart battery or the gas one
but what about the battery dieing and stuff like i said i have a lot of elecitrc airsoft guns about 7 and 3 of them there batterys died so i was wondering bout the smart charger should i get it?
if your getting a pistol not only are gas better, faster, but just feel more realistic and are more fun but on everything else listen to the other people
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