Sealed lead-acid still wins in the cold
Four sealed lead-acid batteries, all 12 V and 100 Ah, and all about 60 lb where a LiFePO4 battery of the same capacity weighs 22. The reason to choose AGM is temperature: Renogy rates its battery to discharge from -4 to 140 °F and UPLUS from -4 to 131 °F, where most LiFePO4 batteries stop charging at freezing. What separates them is how much of the 100 Ah you can use: UPLUS rates its lead-carbon battery for 80% depth of discharge and says ordinary AGM should stay at 50%. Then the discharge limits: Renogy publishes 1,100 A for five seconds, UPLUS 710 A and 45 A continuous, while Mighty Max and UPG publish none. Warranties are short, one or two years. One listing reverses series and parallel wiring, and another gives a weight no 100 Ah lead battery can have; both are noted on their pages. Prices were read on Amazon.com on November 2, 2026.
12 V 100 Ah sealed lead-acid AGM battery, Group 27 per the listing, UL certified, 12.09 × 6.65 × 8.48 in, mounts in any position, battery and screws only, 1-year warranty
A UL-certified 12 V 100 Ah sealed AGM battery that mounts in any position, sold by Amazon at $169.99, the cheapest lead-acid option here.
Best for: Solar and backup banks where price matters more than weight or warranty
≈ $170
12 V 100 Ah lead-carbon AGM / gel hybrid deep-cycle battery, Group 27 (12.05 × 6.61 × 8.19 in), 80% recommended depth of discharge, 25 A maximum charge (full in 5 hours), 45 A continuous, 710 A (5 s), 60 lb, 2-year warranty
A 12 V 100 Ah lead-carbon AGM battery rated for 80% depth of discharge, with charging and discharge limits in amps, at 60 lb and $171.46.
Best for: Solar and RV banks where you want lead-acid but need to use most of the capacity
≈ $171
12 V 100 Ah sealed lead-acid AGM battery, Group 30H, UL recognized, 12.17 × 6.61 × 9.16 in, 60 lb, mounts upside down, float and cyclic use, 1-year warranty
A UL-recognized 12 V 100 Ah Group 30H AGM battery from a US company, mountable upside down, at 60 lb and $197.15. Mind its mixed-up wiring advice.
Best for: Backup and solar banks where a known US brand and support matter
≈ $197
12 V 100 Ah sealed AGM deep-cycle battery, 13.1 × 6.9 × 8.6 in, 63.9 lb, 1,100 A (5 s) maximum discharge, discharge from -4 to 140 °F, under 3% monthly self-discharge, unlimited series and up to 4P parallel, 2-year prorated warranty
A 12 V 100 Ah AGM deep-cycle battery that discharges from -4 to 140 °F, with a 1,100 A five-second peak and low self-discharge, sold by Amazon at $208.99.
Best for: Cold-climate RVs and cabins, and anyone who wants a sealed battery without a BMS
≈ $209
An 80% depth-of-discharge rating with charge and discharge limits in amps.
A published -4 to 140 °F range and a 1,100 A five-second peak.
Leisure battery is a British term for a deep-cycle battery used in caravans and boats. In the US the same product is sold as a deep-cycle or RV battery.
Two 12 V batteries in series. One listing on this shelf says parallel; that is wrong. Parallel keeps 12 V and adds amp-hours.
An AGM profile, at a current the maker allows: UPLUS says 0.25C at most, 25 A for its 100 Ah battery.
Mighty Max and UPG say in any position, UPG including upside down.
Renogy and UPLUS state under 3% self-discharge per month.
The Mighty Max listing gives 28 lb; sealed 100 Ah lead batteries weigh about 60 lb, as the others here state.
AGM earns its place in the cold and on a budget. UPLUS gives the most usable capacity, Renogy the best-documented cold and surge figures, Mighty Max the lowest price.
A column is kept only if four units in five publish its figure. Otherwise it would compare cells left blank.
| Model | Price | Capacity | Chemistry | Size | Warranty |
|---|---|---|---|---|---|
| Mighty Max ML100-12 (Group 27) | $170 | 12 V, 100 Ah | Sealed lead-acid, AGM, valve regulated | 12.09 × 6.65 × 8.48 in; Group 27 per the bullets | 1 year |
| UPLUS LDC12-100M (Group 27) | $171 | 12 V, 100 Ah (10-hour rate) | Lead-carbon AGM with gel electrolyte | Group 27, 12.05 × 6.61 × 8.19 in | 2 years; offices in California and Georgia |
| UPG UB121000 (Group 30H) | $197 | 12 V, 100 Ah | Sealed lead-acid, AGM, valve regulated | Group 30H, 12.17 × 6.61 × 9.16 in | 1 year |
| Renogy RNG-BATT-AGM12-100-US | $209 | 12 V, 100 Ah | Sealed lead-acid, AGM | 13.1 × 6.9 × 8.6 in | 2 years, prorated |
Specifications: manufacturer sheets for portable power gear and the matching Amazon product pages. Prices and availability: Keepa. Every figure in this table names its source.
Most recent revision in this category: November 2, 2026.
A price quoted in the text of a PowerVerdict page dates from the day that page was written; the live figure beside each product is fetched while you read and replaces it.
