Short answer: No, not the way you trickle charge lead-acid. LiFePO4 batteries do not need a slow, continuous top-up charge to stay healthy, and running an old-style trickle charger on one can hold it at a higher voltage than it needs for longer than it needs, which adds unnecessary stress over years of storage.
I get this question constantly from people who just swapped their AGM house bank for a set of Battle Born or Li Time batteries. They have a trickle charger sitting in the garage that kept their old batteries alive for a decade, and the instinct is to just leave it hooked up. Makes sense on paper. It is also the wrong habit for this chemistry.
Why trickle charging exists in the first place
Trickle charging was invented for lead-acid and AGM batteries because they self-discharge fast and suffer from sulfation. Left sitting, a lead-acid battery loses 5 percent or more of its charge per month, and once it sits too low for too long, lead sulfate crystals form on the plates and permanently reduce capacity.
A trickle charger fights that by feeding a small constant current, usually well under an amp, to hold the battery at full float voltage indefinitely. For AGM that is a genuinely good practice. It is the reason your truck battery survives a Minnesota winter in an unheated garage.
LiFePO4 does not work that way. There is no sulfation mechanism, no lead plates, and no chemical reason to keep the pack pinned at a high voltage around the clock.
What lithium actually loses sitting in storage
LiFePO4 self-discharges at roughly 2 to 3 percent per month, sometimes less depending on the cell quality and the battery management system’s own parasitic draw. That is a fraction of what AGM loses.
A 100Ah Battle Born or Ampere Time battery sitting in your RV over a five-month winter storage period might drop from 100 percent to somewhere around 85 to 90 percent state of charge, entirely on its own, with nothing connected. That is not a battery in trouble. That is completely normal chemistry.
Tip: Check the state of charge with a simple battery monitor or even the built-in Bluetooth app most lithium batteries ship with now (Battle Born, Li Time and Renogy all have one) before you assume the battery needs attention. A quick voltage reading around 13.2 to 13.4V resting is a fully healthy pack, not a low one.
The real problem with old-style trickle chargers
Here is where it actually gets risky. A lot of trickle chargers built for lead-acid are float-only devices. They sense voltage, and once the battery drops below a threshold, they push current until it climbs back to somewhere around 13.6 to 13.8V, then hold there.
For lead-acid that voltage is fine long term. For LiFePO4, the top of a healthy charge curve is closer to 14.2 to 14.6V during absorption, and full rest voltage should settle around 13.2 to 13.6V. A cheap trickle charger holding a lithium pack near 13.8V continuously is not going to instantly hurt anything, but it is keeping cells at a higher average state of charge than they need, and doing that for months at a time is one of the few things that meaningfully accelerates calendar aging in lithium cells.
A mistake I see constantly: someone buys a $20 trickle charger from an auto parts store, wires it straight to the lithium bank, and walks away for the season. It is not going to burn the RV down. It is just not doing what they think it is doing, and it is spending money and shelf space on something the battery does not need.
What a real scenario looks like
A customer I helped last fall had converted his Class C to a 300Ah Battle Born setup and wanted to “trickle charge it all winter like I always did with the old AGMs.” He had a Battery Tender Plus, a well-regarded lead-acid maintainer, wired to the house bank through the shore power inlet.
Nothing catastrophic happened over four months. But when he checked in spring, the BMS had cycled the charge relay dozens of times trying to regulate against a charge profile it was not designed to negotiate with. The battery was fine. It just was not necessary, and a smarter approach would have saved him the anxiety and the wear cycles.
When a charger left connected actually makes sense
This is not an argument for never leaving your lithium bank connected to shore power. If your RV converter, WFCO unit, or Victron charger has a proper lithium profile (bulk, absorption, then a true float around 13.6V or a full disconnect), leaving it plugged in year-round is completely fine and is actually how most full-time RVers run their systems.
The difference is the charge algorithm, not whether current flows. A charger with a correct lithium charge profile knows to stop pushing current once the pack is full and either floats gently or shuts off entirely. That is fundamentally different from a dumb trickle charger holding voltage against a chemistry it was never calibrated for.
| Charger type | Good for lithium storage? | Why |
|---|---|---|
| Lead-acid trickle/maintainer | Not ideal | Holds voltage too high for too long, wrong absorption logic |
| Multi-stage charger with lithium profile | Yes | Correct bulk/absorption/float curve, low or no float current |
| RV converter set to lithium mode | Yes | Same as above, built into your existing system |
| Nothing, battery disconnected | Yes, for long storage | No parasitic load, minimal self-discharge, zero risk |
What to do instead of trickle charging
- Check your charger settings to confirm it has a lithium or LiFePO4 profile, not just AGM or flooded
- If storing the RV or boat for more than a month, charge the battery to 50 to 60 percent rather than 100 percent before disconnecting
- Disconnect the battery from the charger and from parasitic loads (propane detectors, clocks, alarm systems) if you are not visiting the rig for months
- Check state of charge every 60 to 90 days if you can access the battery, and top up if it drops below 20 percent
- If you must leave a charger connected, verify with a multimeter that float voltage sits around 13.2 to 13.6V, not 13.8V or higher
This is also a good moment to double check your actual charger settings rather than assuming. I walk through exactly what numbers to look for in charger settings that keep lithium happy, and if you are unsure whether your specific charge voltage is correct for your battery brand, the right charge voltage for LiFePO4 breaks down the numbers by absorption and float stage.
What if all you have is an old lead-acid charger
Plenty of people ask whether they can just keep using what they already own instead of buying something new. It is a fair question when a decent lithium-aware charger from Victron or Progressive Dynamics runs $150 to $400 depending on amperage.
I cover that question directly in can a lead-acid charger charge lithium, but the short version is that it will often work in a pinch without immediately damaging anything, thanks to the battery’s own BMS acting as a safety net. It is just not something you want as your permanent charging setup if you can avoid it.
What this means for your storage routine
Lithium batteries reward a hands-off approach far more than lead-acid ever did. Per the chemistry behind LiFePO4, there is no sulfation to fight and a self-discharge rate low enough that most owners can genuinely just disconnect and forget for a season.
If you want to be diligent about winter storage, spend your energy checking that your charger’s profile matches lithium instead of hunting down a trickle charger. According to Battle Born’s own charging guidance, a properly configured multi-stage charger with a lithium setting is really all a healthy pack needs, whether it is plugged in constantly or checked on every couple of months.
So no, do not go out and buy a trickle charger for your new lithium bank. Check that your existing charger has the right profile, charge to a moderate level before long storage, and let the battery’s low self-discharge do the rest of the work for you.
