RV, van and boat batteries
Swap the lead-acid. Keep the fridge cold all weekend.
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What switching saves
$59/yr
less than AGM at 100 nights a year
$24 vs $84 a year for about the same usable power
106 lb
lighter for about the same power
22.05 lb vs 128 lb for two AGM batteries
2x
the power you can actually use
1,280 Wh vs 600 Wh from a 100 Ah AGM run to half
17x
more energy over its life
4,000 full cycles vs 500 half cycles
Prices on October 16, 2026: Redodo's US site and Renogy's US site. Assumes one full use per night away, 100 nights a year. Lithium life is capped at Redodo's stated 10 years. AGM life counts cycles only, which flatters it, since lead-acid also ages on the shelf.
What size do you need?
Tick what you run and how long you stay off hookups. We pick the smallest Redodo 12 V battery that covers it.
Your battery
Redodo 12V 100Ah
Runs what you ticked for about 2 days on one charge, using about 537 Wh a day.
- $242.89on Redodo's site when we checked
- 22 lb, versus about 192 lb for the 3 lead-acid (AGM) batteries it would take to match it
We keep 10% in reserve. Solar is the US median from PVWatts for fixed panels; flat RV roofs and winter make less.
Our Redodo picks
Best value for most RVs and vans
Redodo 12V 100Ah LiFePO4 Lithium Battery
Drops into a Group 31 battery space and doubles the power you can use. Enough for a weekend of fridge, lights and phones.
- Fridge, lights, phones: about 2 days
- 22.05 lb, one-hand lift
Best for cold-weather camping
Redodo 12V 100Ah Self-Heating Lithium Battery
Warms itself before charging below freezing, so solar or your alternator can still top it up on a frosty morning.
- Charges below 32°F
- Same 1,280 Wh as the standard 100 Ah
Best for boondocking and big loads
Redodo 12V 300Ah Lithium LiFePO4 Battery
Three days of fridge, lights, CPAP and laptop in one box, and 2,560 W continuous for a coffee maker or microwave through an inverter. Want it lighter? The 12V 200Ah Plus ($449.99) has the same power output and two-thirds the energy.
- Fridge, lights, CPAP, laptop: about 3 days
- 59.6 lb vs six AGMs
Best for a 24 V trolling motor
Redodo 24V 50Ah Bluetooth Lithium Trolling Motor Battery
One battery in place of two 12 V lead-acid batteries wired together, for motors up to 100 lb thrust. The app shows how much is left before you head back.
- 21.14 lb in total
- Bluetooth charge gauge
For off-grid cabins and home solar
Redodo 48V (51.2V) 100Ah LiFePO4 Lithium Solar Battery
A 48 V building block for solar systems with a 48 V inverter. Four together store 20 kWh, with Bluetooth monitoring on each.
- 5,120 Wh per battery
- Up to 4 in parallel
*Single-battery prices on Redodo's US site when we checked on October 16, 2026; Redodo runs frequent sales. Want an app gauge on a 12 V battery? The Redodo 12V 100Ah Group 31 Bluetooth Lithium Battery was $265.99.
Lithium vs lead-acid, year by year
Cost per year for about the same usable power: one Redodo 12V 100Ah (1,280 Wh) versus two Renogy Deep Cycle AGM Battery 12V 100Ah batteries run to half, the most Renogy advises.
| Nights away a year | AGM lasts | AGM per year | Lithium lasts | Lithium per year |
|---|---|---|---|---|
| 50 | 10+ yr | $42 | 10 yr | $24 |
| 100 | 5.0 yr | $84 | 10 yr | $24 |
| 200 | 2.5 yr | $167 | 10 yr | $24 |
| 365 (full-time) | 1.4 yr | $305 | 10 yr | $24 |
One full use per night. AGM: $208.99 each, 500 cycles at 50% depth of discharge, 63.9 lb, 2-year prorated warranty (Renogy). Lithium: 4,000 cycles at 100%, 10-year life and 5-year warranty (Redodo). Both are the makers' own ratings.
Pair it with solar
A battery sets how long you can stay; solar sets whether you have to leave. In the median US state, PVWatts puts the output of 1 kW of fixed panels at about 3.7 kWh a day across the year, so a 200 W roof panel puts back about 744 Wh a day and 400 W about 1,488 Wh, roughly a day of fridge, lights and phones. Flat RV roofs, shade and winter make less.
Lithium suits solar better than lead-acid: it takes a charge faster, doesn't mind sitting part-charged, and you can use nearly all of it. Use a solar charge controller with a lithium setting.
At home, the same idea scales up: see plug-in solar for panels that plug into an outlet, and home battery backup for outage power. Prefer one box with outlets built in and nothing to wire? A portable power station does the job without an inverter or charger.
Myths, answered
Specs
| Battery | Price* | Energy | Continuous | Weight | Rated cycles | Cold weather | App | Warranty |
|---|---|---|---|---|---|---|---|---|
| Redodo 12V 100Ah LiFePO4 Lithium Battery (opens in a new tab) | $242.89$279.99 | 1,280 Wh (12.8 V, 100 Ah) | 100 A | 22.05 lb | 4,000 | Not stated | No | 5 yr |
| Redodo 12V 100Ah Group 31 Bluetooth Lithium Battery (opens in a new tab) | $265.99$389.99 | 1,280 Wh (12.8 V, 100 Ah) | 100 A | 22.84 lb | 4,000 | Low-temp cutoff | Bluetooth | 5 yr |
| Redodo 12V 100Ah Self-Heating Lithium Battery (opens in a new tab) | $279.99$559.99 | 1,280 Wh (12.8 V, 100 Ah) | 100 A | 23.32 lb | 4,000 | Self-heating | No | 5 yr |
| Redodo 12V 200Ah Plus Deep Cycle Lithium Battery (opens in a new tab) | $449.99$769.99 | 2,560 Wh (12.8 V, 200 Ah) | 200 A | 45.59 lb | 4,000 | Not stated | No | 5 yr |
| Redodo 12V 300Ah Lithium LiFePO4 Battery (opens in a new tab) | $599.99$1,099.99 | 3,840 Wh (12.8 V, 300 Ah) | 200 A | 59.6 lb | 4,000 | Not stated | No | 5 yr |
| Redodo 24V 50Ah Bluetooth Lithium Trolling Motor Battery (opens in a new tab) | $299.99$359.99 | 1,280 Wh (25.6 V, 50 Ah) | 50 A | 21.14 lb | 4,000 | Low-temp cutoff | Bluetooth | 5 yr |
| Redodo 48V (51.2V) 100Ah LiFePO4 Lithium Solar Battery (opens in a new tab) | $929.99$1,699.99 | 5,120 Wh (51.2 V, 100 Ah) | 100 A | 82 lb | 4,000 | Low-temp cutoff | Bluetooth | 5 yr |
| For comparison: Renogy Deep Cycle AGM Battery 12V 100Ah | $208.99 | 600 Wh usable (12 V, 100 Ah at 50%) | Not stated | 63.9 lb | 500 (at 50%) | — | No | 2-year prorated |
*Price and specs from each product page on Redodo's US site, checked October 16, 2026. Cycle ratings are the makers' own figures at their stated depth of discharge.
Frequently asked questions
Is a lithium RV battery worth the money?
Usually, yes. A 12V 100Ah lithium battery cost $242.89 on Redodo's site on October 16, 2026 and gives 1,280 Wh you can use. To get that from AGM lead-acid you need two 100 Ah batteries ($417.98, 128 lb) because AGM should only be run down halfway. Counting cycles alone, for 100 nights a year the lithium works out to about $24 a year versus $84 for AGM, and it weighs 22.05 lb.
What size lithium battery do I need for my RV?
Add up what you run in a day. A 12 V compressor fridge, LED lights, phones and a water pump come to roughly 600 Wh a day, so one 12V 100Ah lithium battery (1,280 Wh) covers about two days. Add a CPAP, laptop or furnace fan and a 200 Ah or 300 Ah battery makes more sense. Use the picker on this page for your own answer.
Can I charge a lithium battery in freezing weather?
Not without help. Battery University says lithium-ion cannot be charged below 32°F (0°C) without damaging it, though it can discharge in much colder weather. Batteries with a low-temperature cutoff simply refuse to charge until they warm up. Self-heating batteries, such as Redodo's 12V 100Ah Self-Heating ($279.99 when we checked), warm themselves first so they can charge on cold mornings.
Do I need a new charger or converter for a lithium battery?
Often not a new one, but it needs the right setting. Redodo lists a charge voltage of 14.4 V (plus or minus 0.2 V) for its 12 V batteries. Many recent RV converters, solar charge controllers and chargers have a lithium or LiFePO4 mode; an older lead-acid-only charger may undercharge it, and any equalize or desulfation mode must be off. Check your converter's manual before you swap.
Are lithium RV batteries a fire risk?
The kind sold for RVs and boats, lithium iron phosphate (LiFePO4 or LFP), is the most heat-stable lithium chemistry: Battery University calls LFP one of the safest lithium-ion types, with good thermal stability and tolerance if abused. No battery is risk-free, so use the right cable size, a fuse close to the battery, and a battery with a built-in management system (all the Redodo models here have one).
Can a lithium battery start my engine?
Not these. Redodo says its deep-cycle batteries in this guide are not for engine starting. They replace the house or trolling-motor battery, not the starter battery.
Prices and specifications are copied from the makers' US websites on the dates shown and change often. Daily use figures are typical values; your appliances may use more or less. Have a qualified technician check your converter, alternator charging and wiring when you change battery type. See our disclaimer.
Sources
- Redodo 12V 100Ah LiFePO4 Lithium Battery product page — checked October 16, 2026
- Redodo 12V 100Ah Group 31 Bluetooth Lithium Battery product page — checked October 16, 2026
- Redodo 12V 100Ah Self-Heating Lithium Battery product page — checked October 16, 2026
- Redodo 12V 200Ah Plus Deep Cycle Lithium Battery product page — checked October 16, 2026
- Redodo 12V 300Ah Lithium LiFePO4 Battery product page — checked October 16, 2026
- Redodo 24V 50Ah Bluetooth Lithium Trolling Motor Battery product page — checked October 16, 2026
- Redodo 48V (51.2V) 100Ah LiFePO4 Lithium Solar Battery product page — checked October 16, 2026
- Renogy Deep Cycle AGM Battery 12V 100Ah product page — checked October 16, 2026
- Battery University BU-410: Charging at high and low temperatures — No charging below 32°F (0°C)
- Battery University BU-205: Types of lithium-ion — LFP thermal stability and cycle life
- Dometic CFX3 35 specifications — 0.98 Ah per hour at 12 V, 90°F outside, 39°F inside
- PVWatts v8 solar model (National Laboratory of the Rockies, formerly NREL, run via its PySAM package) on NASA POWER hourly weather — average of 2015-2024 hourly weather
Keep going
Photo: Jackery Power Station on Unsplash (Unsplash License).