That's the idea. Most manufacturers recommend that lipos be charged at no more than 1C.

The 1C charge rate is simple to figure; it depends on the capacity of the pack. Examples:
640 mAh pack. 1C charge rate = 640mA
1000 mAh pack. 1C charge rate = 1000 mA = 1 Amp
1500 mAh pack. 1C charge rate = 1500 mA = 1.5 Amp
2000 mAh pack. 1C charge rate = 2000 mA = 2.0 Amp
etc.

Charging at greater than 1C can permanently damage the lipo cells, to the point that venting with flames can result. A few lipo makers (FMA is one example) have lipo systems that support safe charging at a 3C charge rate, cutting charge time by two-thirds.

Charging at less than 1C is always OK, it just takes longer. There is some evidence that charging at less than 1C will help to prolong the life of the battery, so some people routinely charge lipos at 0.7C in order to maximize the life of their packs.

- Jeff