Upgrade 7.4v 1800mah Battery for MJX F645 F45 RC Helicopter

Ok - so just replaced my old motor with the brushless system and was quite UnderWhelmed at the performance.Of course anythings better than a brushed motor that craps out intermittently in flight...But once I got this upgrade battery put in that birdy - WOW!I HAD been flying the F45 with a 900 mAh lithium poly with impressive performance -(lighter than the cylindrical 1500 mAh stock)as it turns out - the two old blue one's were simply WORN OUT after a year's use.So I haven't weighed these, but I'm betting they are LIGHTER than the stock Lithium Ion batteries....PERFORMANCE WAS AMAZING - This heli has NEVER flown FOR THIS LONG - not even when brand new!!! It seems that it must have flown nearly 20 minutes! (can't tell for sure - I didn't time it)You Want To Buy THIS Battery!(Oh - and if your'e riding the fence a bout getting a BRUSHLESS motor for your F45/F645 - DO IT!It runs SO quiet and SO cool!)

Good to have a back up.

Does what its suppose to do and lasts a little longer then the stock battery. It is slightly smaller so it may need to be strapped to the housing to keep it from shifting during flight.

does the job

Excellent batteries, increases flight time by approx 3 Minutes. Have several of them and not a bad one in the lot.

This battery fits quite snugly where the original usually sits. No altering of the helicopter body at all.

More oomph and longer flight times. It's a lot more fun to fly with a lipo battery.

it work perfectly i have more time in fly