When you say the TM's built-in charger, are you talking about that T-handle knob that disconnects power from the battery and the outlets/appliances inside? When we recharge the batteries, we engage the T-handle so the batteries are ""connected"", and then plug it into shore power only for a day or two before unplugging it. We never leave it just plugged in otherwise and we disengage the T-handle to prevent phantom power drainage from the batteries. This is how the dealer told us to do it, but I just need a maintenance free battery.

Thanks!

I recently switched to a lithium battery for my 2010 TrailMini 18L and it's been great. I got tired of the hassle with lead batteries and wanted something maintenance-free. After some research, I found that lithium batteries can be charged with the shore power cable during storage, which is super convenient. I went with a well-reviewed brand and haven’t looked back since.

One key thing I learned is that lithium polymer battery manufacturers have really improved the technology in recent years. Sure, they are pricier upfront, but they last longer and perform better, making them a solid investment in the long run.

I know that lithium batteries are lighter and safer than lead-acid ones. I noticed they hold a charge much better, especially in colder weather, which is a big plus for me since I use my RV year-round.

I recently switched to lithium batteries for my RV and gotta say, I'm a fan. I went with an IoT batteries, and the benefits are solid. No need to fuss over water levels anymore, so maintenance-free living is real. They charge up nicely with shore power, and you can monitor them via an app—super handy.