Case-Mate’s translucent and colorful USB-C chargers start at just $15.40 today. | Image: Case-Mate If you’re hunting for a graduation gift that’s both playful and practical, Case-Mate’s Fuel USB-C Charger is a good option. The portable charger delivers 30 watts of power so your giftee can quickly power up their smartphone, tablet, or even Nintendo Switch. It does that while looking good to boot, boasting a unique translucent body reminiscent of old iMacs available in a variety of fun colors. Best of all, starting at just $15.40 ($14.59 off) in lime green at Amazon, it’s affordable, so you can buy Mom one, too, for Mother’s Day — or just for yourself. We won’t judge! If you were thinking about buying Google’s…