.1C is considered the maximum charge rate for LiPo packs. That's 1/10th battery capacity. 1250 mah battery pack (1.25 Amp Hours) means to charge it at a charge rate of about .125 amps. In this case, 250 is the lowest range on your charger.. to bad you don't have that goes one octave down.. 125 ma.. but if that's what you have, then that will have to do. Just be careful.

There are fast chargers that do it much faster, but be very careful using them.

ALWAYS charge your LiPo packs outside never in the house, or in your car/truck/van whatever. LiPo packs are dangerous.

CGr.