If your phone is no longer under warranty, you can get a universal charger phone charger from eBay, cost me $1.50. It's colored black and has two adjustable prongs for battery terminal charging.
https://www.google.com/aclk?sa=l&ai=DChcSEwiGiqLAx6zWAhUTh7MKHWBsCVYYABARGgJxbg&sig=AOD64_28jaNXNfVN85ZjUEC2dE1T9Gadfw&ctype=5&q=&ved=0ahUKEwi8tYzAx6zWAhVISiYKHa4ADCgQrkMIywE&adurl=
It worked for me, every time I need to charge the battery, I remove it and charge it. It does not take long to charge.