I purchased 3 li-po's (4100) when they were out of stock. They arrived in stock when they promissed, and to my surprise I got them just a couple of days later. The prices are great, but I still did not try them. I will later this week in my Electric Telemaster, and use them later in the RV-6 (Great Planes Arf) I am finishing. I must say the packs were very well packed:-)

Gerry