first off if iam beating a dead horse, go ahead and flame me. i have die-hard nimh a-a bats for my glow plugs, and the charger for them. i was testing bats by putting them into the glow ignitor and puting a lc-3 plug in. i found that a 1.2 bat didnt glow very bright, but a 1.3 glowed very good. and i found i could recharge the low voltage bat and bring then up to 1.3. some were even 1.39. the voltmeter is your friend.