A lead-acid charger never finishes a lithium battery · review
ECO-WORTHY 12 V/24 V 20 A, automatic detection, 0 V activation review
A 20 A charger for 12 V and 24 V systems with four selectable currents, automatic voltage detection, a 0 V activation function for lithium packs and a lead reconditioning mode.
The bottom line The only charger here that can wake a LiFePO4 pack its management system has disconnected, with four currents and four chemistries. It publishes not one charging voltage, which on a four-chemistry charger is four omissions rather than one.
A 20 A charger with the recovery function this chemistry needs.
Zero volts
A LiFePO4 pack taken below its protection threshold disconnects, and from outside it is indistinguishable from no battery at all. Most chargers see nothing and refuse to start. This one applies current anyway to bring the pack back. Across five chargers here, it is the only one to name the function.
Whether a particular pack should be revived that way is a question for its maker, and this page does not answer it.
Four currents, four chemistries
5, 10, 15 or 20 A, with automatic 12 V or 24 V detection, for LiFePO4, AGM, gel and lead-acid. That is a workshop charger rather than a dedicated one.
The reconditioning mode
Named for lead-acid specifically, in the fourth bullet, at 15 A. Keeping it separate from the lithium profile is correct — reconditioning has no role on LiFePO4.
The four missing numbers
Absorption and float voltages, for each chemistry. A charger serving four chemistries applies four different profiles and publishes none of them.
Availability
German, French, Italian and Spanish Amazon stores quoted about 90 € when this page was compiled.
British Amazon store carries it too, priced in its own currency, which the euro range above deliberately omits.
American Amazon catalogue carries an entry for it, with nobody selling.
These figures are what Keepa reported on the day this page was last updated. Availability and pricing move without notice.
Prices quoted in this text were read on 16 September 2026. The live price is at the top of the page.
What it gets right, and what it leaves out
Strengths
0 V activation for a LiFePO4 pack whose management system has disconnected — the recovery function that matters most on this chemistry
Four selectable currents and automatic 12 V or 24 V detection
A reconditioning mode specifically for lead-acid, kept separate from the lithium profile
Compromises
No absorption or float voltages for any of the four chemistries
The low-temperature claim applies to lead and gives no threshold
No protection list at all
Specifications
Charge current
Selectable at 5, 10, 15 or 20 A, first bullet
Absorption
Nowhere in the listing
Float voltages
Nowhere in the listing
Profiles
LiFePO4, AGM, gel and lead-acid with automatic 12 V or 24 V detection, first bullet
Low-temperature behaviour
Lead-acid charging at low temperatures is named in the third bullet with the four current options; no threshold is published
Connectors
Nowhere in the listing
Protections
Absent as a list; a 0 V activation function and a lead reconditioning mode are named in the second and fourth bullets
Amazon reference
B0F6LR6BLZ (same reference on 6 Amazon marketplaces)
EAN
0810127139381
Questions owners ask about this one
What is 0 V activation?
A LiFePO4 pack whose management system has cut off on low voltage presents nothing at its terminals, and an ordinary charger sees no battery and refuses to start. A 0 V activation function applies a current anyway to bring the pack back above its threshold. It is the single most useful feature on this charger.
Should every flat lithium pack be revived this way?
Not automatically. A pack that has been deeply discharged may have been damaged, and its maker’s documentation is where the recovery procedure — and whether one is permitted — is set out. This page reports the function rather than recommending its use.
5 A charge · absorption not published · float not published, a patented maintenance stage is named · LiFePO4 only, 5–60 Ah charging and up to 120 Ah maintenance · low-temperature behaviour not published · connectors not described · test sequence before charging
A 5 A charger dedicated to 12 V LiFePO4 batteries, charging packs from 5 to 60 Ah and maintaining up to 120 Ah, with a test sequence that assesses the battery before charging.
Best for: A motorcycle, a classic car or a small leisure pack that spends months unused.
10 A charge · 14.6 V constant voltage published · float not published · LiFePO4 only, 12 V/12.8 V · low-temperature behaviour not published · connectors not described · over-temperature, output over-voltage, over-current, reverse polarity, output short circuit, overload
A 14.6 V 10 A charger built only for 12 V LiFePO4 batteries, using a three-stage constant current, constant voltage and full charge sequence with a side cooling fan.
Best for: A 12 V LiFePO4 bank that wants a charger doing one thing correctly.
15 A charge · seven-stage algorithm from bulk to float, voltages not published · float named as a stage · lead-acid and lithium-ion, 12 V and 24 V · low-temperature behaviour not published · CEE 7/17 mains lead · IP65 · forced charge and desulfation for deeply discharged batteries
A 15 A IP65 charger with a seven-stage algorithm, integrated Bluetooth, and a forced charge function with a built-in desulfator for reviving deeply discharged batteries.
Best for: A boat or a van locker where the charger lives permanently and is checked from a phone.
