I've also put a pot in one of mine to adjust for seasonal temperatures. The ones in the garage have been working several years. The float chargers I used outside didn't last. They were discussed on this forum in 2012: The HF float chargers can put out 500 mA but don't unless the battery needs it. I posted the schematic on ARF some time ago, found here. I made a simple low voltage alarm to solve that problem. I've used these cheap Harbor Freight float chargers for years knowing they can drain the battery if they fail. It or the other one, I can't remember which one, malfuntioned in a way that melted the wiring, which could have caused a fire. One failed and output too much current (no longer float charge).

One for the RV house battery and the other for the RV truck battery. A few years ago, I bought a more expensive pair from Walmart. Hot-Selling Products Frieling 5002 Electric Low-Fat Fryer / Maraehan Jackgold Air Fryer Oven / NUWAVE BRIO 4.5-Quart Digital Air Fryer / PowerXL Vortex Air Fryer Plus 5 Quart / George Foreman GHFD6800B Twist N Crisp Air Fryer / Flexzion Electric Air Fryer Cooker 1400W, 5.8 Quart (Black) / Emerald Air Fryer w/ Digital LED Touch Display 1400 Watts / SMALL FISH Air fryer Yellow Oilless Oven / SFPY Air Fryer, 4.5L Air Fryer Oven with 6 Pre-Set Functions / Brentwood Select 3.4Qt Electric Air Fryer / TOYTEXX and DESIGN Intexca US Electric Mini Portable Compact Washing Machine / Avanti Portable Compact Washing Machine for Clothes/Laundry / KVZVK Portable Mini Washing Machine / Avanti STW16D0W Portable Washing Machine / Bonnlo 26lbs Portable Washing Machine / Tiptop Home Portable Washing Machine 10L Mini Washing Machine / LEMY Mini Baby Washing Machine Portable and Compact Laundry Washer / ECPro Foldable Mini Folding Clothes Washing Machine / SSYY Portable Washing Machine Mini Foldable Washer / DYRABREST Portable Washing Machine / Skullcandy Sesh Evo True Wireless Earbuds / TOZO NC9 Hybrid Active Noise Cancelling Wireless Earbuds / Tribit IPX8 Bluetooth5.0 Deep Bass Bluetooth Earbuds / kurdene S8 Pro Bluetooth 5.2 Earbuds / Beats Studio Buds True Wireless Noise Cancelling Earbuds / TOZO A1 Mini Wireless earbuds Bluetooth 5.Don't trust anything cheap.

Cen tech battery charger review