I'm not so sure a $6.00 constant current output charger is all that good for lipo batteries. I use a SkyRC iMAX B6 charger for my lipos and they are all in top shape. This charger uses a charging profile that decreases the current as the proper voltage gets close, 12.6 V for your particular battery. Do a little research on it and learn about properly charging lipos. (Amazon sells them for around $35. Make sure you get the SkyRC ones, the B6 has many rip-off clones out there that tend to over charge.)
I'm sure there are many other quality chargers out there, but not for $6.00.