iEGrow via Amazon offers its iEGrow 2-Bay LCD Smart Li-ion Battery Charger for $16.99. Coupon code "5QTOHW6Z" drops it to $8.49. Plus, Prime members bag free shipping. That's tied with our mention from two weeks ago, $11 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 June 8.