SkyRC D100 V2 AC/DC 2 x 100W Dual LiPo Balance Charger

We take pride in selling high quality products at rock-bottom prices and we offer a 30-Day Warranty on all the products we sell. If one of our products fail within 30 days of receipt we will replace or refund. All items which are returned to us for refund or exchange are subject to inspection, and if they appear to be used outside of the scope of their intended use (or used in an application they were not intended for), if any physical damage is present or if they have been modified from their original state then we reserve the right to refuse a warranty claim. Electronics that have failed due to misuse, abuse, water-damage, running higher voltage than recommended, improper gearing and overheating are not covered under warranty. All items being returned under warranty must include all items originally included with product or a re-stocking fee will be assessed.

Not sure what you mean by fuel gauge, but this is the latest V2 version of this charger.