I also read the manual about only using their charging equipment. I don’t think I ever used the included charger even once. I decided I was just going to ignore that part of the manual. lol. So far no issues.
T-slim charging
The Anker 3350 mAh battery (pictured in the link above) is quite small and light (and only about $15 on Amazon). About the size of a tube of chapstick (more or less). Works great with the X2 pump or the Dex Receiver or a Phone. Nice to have one easily carried battery that can provide backup power to all your devices.
I also have a larger Jackery 12,000 mAh portable USB battery (pictured below). I use this to power my tablet. This one is a bit bulky to lug around but nice to have for times such as camping or just if I know I will be running my tablet a long time away from convenient AC power. I use the 12,000 battery to charge anything. Tablet, Dexcom Receiver, Phone, whatever.
