Battery cases must be able to add extra juice to your phone and provide damage protection. You’ll also want something that doesn’t interfere with your phone's features, like NFC or ports, nor ...

Although the 4V battery that comes with this Skil SD5619-01 Twist 2.0 Rechargeable 4V Screwdriver is relatively underpowered compared to the 8V options offered by some higher-end brands ...