How do I keep my Xmate powerbank in good condition ?
Any powerbank battery will degrade over time due to, sorry to say this - user negligence or ignorance. So to keep battery health in top condition always : once a month use the powerbank until battery totally flat, then charge it back to full using the ORIGINAL charger.
Important : do not overcharge the powerbank, always use the original charger, and do not charge the powerbank while using the powerbank even if it can be used while charging.
That's all. It's just a habit that will keep your powerbanks (battery) in great condition to last a really, really long time.