If you’ve ever looked into upgrading a Pocket PC device, then you probably have heard of Pocket PC Techs. They offer various upgrade kits and accessories for a large number of devices. I recently purchased a battery for a Compaq iPAQ H3650. The battery is internal, and I couldn’t get a part number for it from Compaq directly, or through a Compaq reseller. I did a search on the Internet and found that Pocket PC Techs offered a kit. It came with a battery, as well as a stylus lock mechanism (you can also just get the battery kit). The hardware came with a very thorough 22-page instruction booklet with detailed pictures of how to remove the cover, remove the battery, and install the new one. It was all quite impressive. I wouldn’t hesitate to recommend them to anyone.