Brand
AGM and lithium, side by side
The same supplier offering both chemistries makes the comparison unusually direct.
Weight, for the same usable energy — lithium is dramatically lighter.
Usable depth. An AGM battery taken below half its rating regularly will not last; a LiFePO4 battery goes far deeper as a matter of routine.
Cycle life, which differs by a large multiple.
And cold. Lithium must not be charged below freezing without a heater, and AGM can be.
Depends on the vehicle. A motorhome that is used in winter and parked cold has a real argument for AGM; one that carries weight badly and cycles daily has a stronger one for lithium.
Capacity and chemistry, reliably. Cycle life and depth of discharge, variably — and the individual pages mark which.
Cost per usable kilowatt-hour over the expected cycle life, which neither listing computes and both give the ingredients for.
100 Ah C100 at 12 V · AGM VRLA, valve-regulated and maintenance-free · deep-cycle construction · round standard posts, positive on the right · 278 × 175 × 190 mm · supplied ready to use
A 12 V 100 Ah valve-regulated AGM battery rated at the C100 hour rate, published with dimensions, post type and polarity, and supplied ready to use.
Best for: A straight AGM replacement in a motorhome where the existing charger profile already suits lead-acid.
≈ €120
100 Ah at 12.8 V · up to 1C charge and discharge · BMS with balancing · 8500 cycles at 30 % DoD · M8 internal thread · 260 × 168 × 209 mm
A 12.8 V 100 Ah LiFePO4 battery with an integrated BMS, quoted at up to 1C charge and discharge, with dimensions and terminal type published in full.
Best for: Replacing a lead-acid leisure battery in an existing tray, where the physical fit has to be checked first.
≈ €167
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.
