Your Guide to Mobile Power

AGM vs LiFePO4 in 2026, on the specs that actually differ: usable capacity, weight, cycle life, cold-weather charging, and cost per usable kWh. Lithium wins nearly everywhere except cold storage, DIY-only installs, and resale.

Camper battery not charging? Use our multimeter diagnostic table to find the cause fast, corrosion, disconnect switch, converter failure, or phantom loads.

Every LiTime 12V spec in one place, Classic 100Ah Group 31, Group 24 self-heating, 100Ah XtraMini, and 200Ah XtraMini compared on BMS rating, cold-weather behavior, dimensions, Bluetooth, cycle life, charger profiles, and cost per cycle.

UL 2849 tests the entire electrical system, UL 2271 tests the battery pack alone, and CE marking uses a completely different framework. Here's what each verifies.

NFPA 1192 doesn't spell out lithium battery details itself. It defers electrical requirements to NFPA 70 and ANSI/RVIA LV, and it's ANSI/RVIA LV that requires a listed battery.

UL 1973 tests the battery and BMS, UN 38.3 tests transport safety, and CE marking is a self-declared EU compliance mark. Here's what each one actually verifies.

Technically yes, but a car battery fails quickly under RV house loads. Starting batteries and deep-cycle batteries are built for opposite jobs, and using one for the other destroys it in weeks.

An AGM battery needs replacing if resting voltage stays below 11.8V after a full charge attempt, or if it drops below 9.6V during a 15-second load test. LiFePO4 batteries signal end of life through capacity loss, not voltage.

An AGM RV battery lasts 4–7 years or 300 to 700 cycles at 50% depth of discharge. A LiFePO4 battery lasts 10+ years or 3,000 to 5,000 cycles at 80% DoD depending on how deeply you discharge it.

The formula: daily watt-hour usage × days of autonomy ÷ usable depth of discharge = minimum watt-hours. For most weekend boondockers, a 200–300Ah LiFePO4 bank is the practical starting point.

RV batteries keep dying from parasitic draw, an undersized bank, a charging system that isn't keeping up, or a battery at end of life. Here's how to diagnose which one applies.

Every Battle Born spec in one place, cold-weather performance, cycle life, BMS low-temp cutoff, self-discharge, weight, charger profiles, warranty terms, certifications, and cost per cycle for the 100Ah and 270Ah GC3 lines.

If your battery has more than 500 cycles and holds less than 70% of its original range, replacing is more cost-effective than recalibrating. Here's how to test pack voltage, find your cycle count, and decide.

A 52V battery delivers roughly 8% more voltage at full charge than a 48V pack, modestly higher top speed and stronger power under load. Here's what the numbers actually mean and what to check before upgrading.

Sudden range loss is almost always riding mode, temperature, or tire pressure, not the battery dying. Here's how to tell environmental causes from real degradation, in order.

Store your ebike battery at 40–60% charge, between 32–68°F (0–20°C), and check it every 3 months. Here's the math behind those numbers and what happens when you ignore them.

A working BMS does stop charging at full, but FDNY guidance says never charge unattended or overnight. Both are true; here's why they don't contradict each other.

Heat, deep discharge, storage voltage, and charge rate each measurably shorten ebike battery cycle life. Here's the data behind each cause, including the Bosch PowerTube 625 spec, and how to slow degradation down.

Most range loss under 500 cycles isn't the battery dying. It's riding mode, temperature, tire pressure, or charging habits. Here's how to diagnose which one, with the actual numbers.

RV batteries most commonly die overnight from parasitic draw, sulfation, or an undersized battery bank. Here's how to diagnose which one is affecting your setup.

LiFePO4 batteries last 3,000 to 5,000 cycles at 80% DoD vs 300 to 700 at 50% DoD for AGM and 150 to 300 at 50% DoD for flooded lead-acid. Here's how the three chemistries compare on cycle life, weight, cost, and real-world value.

If your batteries are consistently low by morning or your inverter is cutting out under normal loads, your bank is likely undersized. Here are 5 signs to check, plus the formula to size it correctly.

The 5 best RV batteries under $500 compared on the specs that actually matter, usable amp-hours, cycle life, cold-weather performance, and cost per cycle. LiFePO4 wins the math by a wide margin.

The 5 LiFePO4 RV batteries worth buying compared side by side, SOK, Renogy Smart Pro, Epoch Eco, Battle Born, and Dakota Lithium, on price, cycle life, weight, warranty, certifications, and cost per cycle.

LiTime vs Battle Born: a 9-point comparison of the two most popular 12V 100Ah LiFePO4 brands on cycle life, weight, cold-weather performance, warranty, certifications, and cost per cycle.

Battle Born vs Renogy: a 9-point comparison of two leading RV lithium brands on cycle life, cold-weather performance, weight, warranty, certifications, and cost per cycle.