Originally Posted by Crescendo
One final clarification if I may: the Miniaviation 190mAh 25c webpage I linked to specifies that the "Balance & Discharge Plug" is of the type "JST-XH". If this battery is in fact compatible with the Champ, does this mean the Champ uses JST-XH plug?
They may be referring to a 2 cell or other multi-cell battery, which would have a balance "tap" connector and a main discharge connector. Single cell Lipos, such as the 190mAh MiniAviation, have a fairly standard connector, as part of the actual cell. They, and most other micro orientated 1S Lipo's will work on the Champ just fine. I am presently having a student fly his Champ on MA 190's, with good performance and flying times. For my own Champ, I use Hyperion 240mAh 1S Lipo's, and they fit the connector just fine, as shown in the photo.
The included 150mAh 1S Lipo that comes with the Champ is OK, but as you will discover via RCGroups and speaking with other Champ flyers, there are better batteries out there that have better capacity, performance, and lower prices. Good luck with your Champ, it's a great plane. I am on my second one now, Champ #1 lost , still out on patrol, and very much missed.