My TI-84 Plus keeps telling me "Your batteries are low. Recommend change of batteries", so I'm just wondering, is it even capable of being charged?? What am I even supposed to do if I'm at school and it just straight up dies? There's a USB cable that came with the calculator, but nothing happens when I plug it into my computer. My friend has a TI-84 Plus CE and I've seen him charge it right before tests but mine doesn't seem like it charges.
Edit: I've seen TI-84 Plus calculators with one, singular, rechargeable Li-ion battery, but mine has 4 replaceable Energizer ones.