As for venom lipos, I haven't heard much about them. But if you have had bad experiences with there stuff before I would go with another brand.
Had no complaints with my maxamps packs that I had, a 4S 6000mah for a 1/8 scale conversion, and a smaller 1/18 scale sized pack (believe 2000mah or 2100mah? been awhile) both worked well.
Another good lipo brand for the money in case you haven't considered it is lipos from trakpower. They make a 3S 11.1V 4900mah 25C lipo hardcased battery pack. They also make a 5400mah 11.1V 5400mah 16C lipo hardcased pack as well. These packs use enerland cells which for 1/8 scale conversion guys have shown to be some of the best for the money.
if shipping cost is a concern, give rclipos a look. The Thunderpower lipos he has listed there has a 3S hardcased lipo listed, and he has free shipping worldwide. worth a look.
As for what to charge a 3S lipo at, go with 1C charge rate unless stated otherwise by the manufacturer.
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