iEGrow via Amazon offers its iEGrow 2-Bay LCD Smart Li-ion Battery Charger for $14.99. Coupon code "OLDBUO7S" drops it to $7.49. Plus, Prime members bag free shipping. That's a buck under our June mention, $12 off, and the lowest price we could find. It recharges 3.7-volt lithium-ion batteries via USB and comes with a micro-USB cable. Deal ends August 31.