Ijust noticed that my 4.5 V 600 mAh Rx pack is not enough for my plane, I'm thinkin on get 5 1200 mAh cells and make my own Rx pack, but my question is, will Ineed to get another charger? the one that Ihave is the stock charger that came with my Futaba radio and states it is for 4.5 V 1000 mAh packs, it also states that it must be only used with that kind of batteries or there could be a fire danger... the rx pack that came with the radio is actuallythe 600 mAh and Ihave never had any problem, can Istill use this charger with a 6.0 V 1200 mAh pack?