This is why I use the Lithium batteries in mine. I had tried the rechargeable ones in my second BT remote, but after a full charge it only shows around 85% and every day I saw that percentage go lower and lower. So I put Lithium batteries in my second one as well. The first one has been using Lithium battteries since last fall and it is still showing 100%. I use the Energizer Ultimate Lithium AA batteries. The last ones I purchased were around $1.25 each when I purchased eight. Most of my other devices use rechargeable batteries now but I still use the Lithium AAs in those TiVo BT remotes, my Thermostat, and I plan on using them in a Fitbit Aria scale(If BestBuy would ever ship it to me).