Autoblog and Yahoo may earn commission from links in this article.A trickle charger is a smart thing to keep in the garage if you have any vehicle or battery powered equipment that sits for long stretches. Cars, motorcycles, boats, ATVs, lawn mowers, tractors, trailers, and seasonal equipment can all lose charge over time, especially if they aren't being driven or used regularly. Instead of finding a dead battery when you finally need the vehicle or machine, a maintainer can help keep the battery topped off and ready. They're great for project cars, weekend toys, stored vehicles, and equipment that only gets used during certain parts of the year.Right now at Walmart, you can get the Motopower 12V Trickle Charger on sale for just $15, nearly 60% off on a compact battery maintainer for most types of 12V batteries, including flooded, AGM, gel cell, and sealed maintenance-free batteries. The charger uses a 1,000mA output and includes SAE quick-release connection options, with ring terminals and alligator clamps. It also has up to 8.5 feet of cable, which is useful if your outlet isn't directly next to the battery.Motopower 12V Trickle Charger, $15 (was $36) at WalmartMotopower 12V Trickle Charger, $15 (was $36) at WalmartCheck PriceThe charger uses pulse charging technology to help recover, charge, and maintain a battery, then stops charging once the battery is full and maintains it at 13.6V. It also has spark-free technology, overcharge protection, LED status indication, and zero output in standby mode when it isn't connected to a battery. This is a lot more practical than dragging out a full-size battery charger every time a stored vehicle starts getting weak. For just $15, it's a good pickup for anyone with a rarely driven car, motorcycle, mower, powersports vehicle, boat, or other 12V battery that needs to stay ready between uses.AdvertisementAdvertisementRelated: Amazon Has a 2-Bank Trickle Charger on Sale for Just $49"Straightforward and easy to use. It performs as expected," said one satisfied shopper.Another reviewer commented, "I used the charger and after two weeks the battery is still at full capacity."Deals We're LovingMotopower Trickle Charger, $15 (was $30) at WalmartSentryse Trickle Charger, $20 (was $32) at WalmartXueyu Trickle Charger, $20 (was $40) at WalmartWalmart's flash deals change all the time, so head over to the retailer's site and pick up Motopower 12V Trickle Charger for only $15 while it's still on sale for almost 60% off.This story was originally published by Autoblog on Jun 5, 2026, where it first appeared in the Deals section. Add Autoblog as a Preferred Source by clicking here.