Saw this posted on another site and seems like an insane deal, but with the caveat that I have not tried them myself yet. It is a dual charger plus two LP-E6N compatible 2000mAh batteries for $18.59. Use code JUSFGJYK at Amazon checkout. There is also currently a 5% off coupon in the listing if you check the box.
Cautiously optimistic this may be good since I have owned other electronic products by RAVPower or TaoTronics. Only 11 reviews shown and one claims the dual charger will work with original Canon batteries. The other reason I am interested is because it will charge from USB using an external power bank. Always wished for that capability.
I have used SterlingTEK batteries in the past without major issues. So, for $20 this is hard to ignore. Will test thoroughly before using for critical assignments.