AiPaper Reader charging issues?

I bought a Viwoods AiPaper Reader in January and have been using it consistently for two months as a pocket ereader. I’ve noticed over the last couple weeks it takes over a day to fully charge. This can’t be normal? I plugged it in last night and this morning it was only charged to 85%. The battery drains incredibly fast, like 10% per hour. Does anyone else have this problem with their Reader?