The used Losi Micro Desert Truck that I purchased on eBay for a great price works well but the OEM NiMH 150 mAH battery pack only lasts for a few minutes after 25 minutes of charging time. Instead of purchasing a new NiMH pack or one of the more costly LiPo (Lithium Polymer) battery packs, I decided to build a long life custom battery pack with four standard size AAA NiMH rechargeable batteries. For more, click on the picture or image below.