Hisgadget via Amazon again offers the Intocircuit Power Castle 11,200mAh Dual USB External Battery Charger in Gray or Silver for $22.99. Coupon code "64FWXKDI" cuts it to $17.99. Plus, Prime members bag free shipping. (Non-members can spend $35 or more to bag free shipping; otherwise, shipping adds $6.55.) That's tied with our mention from last month as the best price we've seen. (It's also a current low by $4.) It features a 2.1-amp USB port for charging tablets, a 1-amp USB port for charging most smartphones, LCD display, and travel pouch.

Also available is the iClever 50-watt 6-Port USB Charger, model no. IC-DC01, for $25.99. Coupon code "WBRDD3GY" cuts it to $18.99. Plus, Prime members receive free shipping. (As above, non-members can spend $35 to dodge a $6.48 shipping fee.) That's the lowest price we could find by $3. It features SmartID technology, which identifies a suitable charging rate for each connected device.