Best LiFePO4 battery charger for 12 V batteries

Updated 2026-11-12 · Pick: Redodo 14.6V 20A LiFePO4 Charger: $82.99 on redodopower.com (checked 2026-11-06): https://dealectric.com/go/redodo-14-6v-20a-lifepo4-charger

Short answer. The best LiFePO4 battery charger for a 12V lithium battery is the Redodo 14.6V 20A: it charges to 14.6V and refills 100 Ah in about 5 h at $4.15 per amp, against $5.15 for the LiTime 20A, $9.99 for the NOCO GENIUS10 and $11.73 for the Victron Blue Smart IP65 12V 15A.

Searched as: Victron Blue Smart IP65 Li-ion mode 12V 15A NOCO GENIUS10 lithium LiTime 14.6V 20A specifications

How this table was made: each figure comes from the maker's own US product page or manual, or from the reviewer named next to it, checked 2026-11-08. Dealectric does not test units itself. Rows with a Buy link are products Dealectric lists: the links are affiliate links, and their codes are re-tested in the brand's own cart every day (last check 2026-11-13).

What the differences mean

Cost per amp is the price divided by the rated charge current. Refill time is the battery's amp-hours divided by that current, which covers the constant-current stage only. The final top-off adds a little: Victron's own worked example is 9.5 h of bulk charging plus about 0.5 h of absorption for 100 Ah on a 10 A charger.

• Redodo 20A: $82.99 ÷ 20 A = $4.15 per amp. 100 Ah ÷ 20 A = 5.0 h. 200 Ah ÷ 20 A = 10 h.
• LiTime 20A: $102.99 ÷ 20 A = $5.15 per amp. That is $20.00 more than the Redodo for the same 20 A at 14.6 V.
• Victron 12/15: $175.95 ÷ 15 A = $11.73 per amp, 2.8× the Redodo's. 100 Ah ÷ 15 A = 6.7 h. It costs $92.96 more and delivers 5 A less.
• NOCO GENIUS10: $99.87 ÷ 10 A = $9.99 per amp, 2.4× the Redodo's. 100 Ah ÷ 10 A = 10 h.
• Peak power: 20 A × 14.6 V = 292 W for the 20 A chargers. The Victron in Li-ion mode gives 15 A × 14.2 V = 213 W, so the 20 A chargers deliver 37% more.
• At 40 A the order flips: LiTime $167.19 ÷ 40 A = $4.18 per amp against Redodo $179.99 ÷ 40 A = $4.50, a gap of $12.80.

Your battery and use	Fits	Why
One 12 V 100 Ah LiFePO4, recharged between trips	Redodo 14.6V 20A	Lowest cost per amp of any 10–20 A charger here, and about 5 h to full. $82.99: https://dealectric.com/go/redodo-14-6v-20a-lifepo4-charger
50 Ah or smaller, such as a kayak trolling-motor battery	Redodo 14.6V 10A	50 Ah ÷ 10 A = 5 h, at $59.99. $59.99: https://dealectric.com/go/redodo-14-6v-10a-lifepo4-charger
200 Ah, or two 100 Ah in parallel	LiTime 40A or Redodo 40A	200 Ah ÷ 40 A = 5 h. LiTime costs $12.80 less but recommends indoor use. Redodo adds a 0 V pre-charge. $179.99: https://dealectric.com/go/redodo-14-6v-40a-lifepo4-charger
A battery left on the charger for months on a boat or RV	Victron Blue Smart IP65 12/15, 120 V	Holds 13.5 V storage instead of sitting at full, IP65, 5-year warranty. Rated for Li-ion batteries of 30–150 Ah.
A garage that also has lead-acid batteries	NOCO GENIUS10	Separate chemistry modes, including 12 V lithium, and a 3-year warranty.

Cost per amp: what a LiFePO4 charger's price buys

Most of a LiFePO4 refill happens at constant current: in Victron's worked example, 9.5 of the 10 hours are bulk charging. So the amp rating sets your wait, and price per amp shows what that speed costs. Among the 10–20 A chargers that suit a single 100 Ah battery, the Redodo 20A is the cheapest per amp at $4.15. The lowest figure found for a new charger is LiTime's 80 A charger, at $259.99 ÷ 80 A = $3.25 per amp. It runs on 100–120 V AC input only and uses a 120 A Anderson connector, so it suits a large bank. Use it only if your battery's own spec sheet allows 80 A of charge current.

Charge voltage. The Redodo and LiTime chargers charge to 14.6 V. The Redodo then shuts off instead of floating. In Li-ion mode the Victron stops at 14.2 V, has no float stage and holds 13.5 V for storage. It also drops temperature compensation in that mode. On a 20 Ah LiFePO4 battery in lithium mode, Auto Median (Chris Perling) measured the NOCO GENIUS10 topping off at about 14.2 V and holding about 13.6 V. The two premium chargers therefore fill a little more gently, while the 14.6 V units fill to the top.

Waking a battery whose BMS has shut off. Redodo says its 20 A and 10 A chargers 'can activate lithium battery protected by BMS', and its 40 A has a pre-charge mode that starts from 0 V. LiTime lists 0 V activation on its 20 A. Victron's manual says the Blue Smart IP65 'will automatically reset UVP and start charging'. The NOCO has a manual Force Mode instead, which Auto Median notes 'bypasses battery detection'.

Heat and cold. Victron rates the 12/15 for −20 to 50 °C, but gives full rated output only up to 30 °C (86 °F). Its manual says not to charge Li-ion below 0 °C, yet the charger keeps running below freezing, so a cold boat or RV needs a battery that blocks cold charging itself. Redodo's low-temperature 100 Ah battery stops charging below 32 °F and resumes above 41 °F. US buyers need the 120 V Victron model (100–130 VAC input).

Not recommended

The NOCO GENIUS10 as the only charger for a 100 Ah or larger LiFePO4 battery. At $9.99 per amp it costs 2.4× the Redodo 20A's $4.15 and takes about 10 h to the Redodo's 5 h on 100 Ah. Auto Median measured its lithium top-off at about 14.2 V. It earns its place only if lead-acid batteries share the garage.

Sources

• Redodo 14.6V 20A: $82.99, 14.6 V, 20 A, pre-charge/CC/CV then cut-off, BMS activation, 100 Ah to 50% in 2.5 h, 2-year warranty (read 2026-11-08) — www.redodopower.com
• Redodo 14.6V 10A: $59.99, 14.6 V, 10 A, BMS activation, 50 Ah to 50% in 2.5 h (read 2026-11-08) — www.redodopower.com
• Redodo 14.6V 40A: $179.99, 14.6 V, 40 A, pre-charge from 0 V, 200 Ah in about 5 h (read 2026-11-08) — www.redodopower.com
• LiTime 12V (14.6V) 20A: $102.99, 14.6 V, 20 A, 0 V activation (read 2026-11-08) — www.litime.com
• LiTime 12V (14.6V) 40A: $167.19, 40 A, 100 Ah in 2.5 h and 200 Ah in 5 h, indoor use recommended (read 2026-11-08) — www.litime.com
• LiTime 12V 80A: $259.99, 100–120 V AC input only, 120 A Anderson (read 2026-11-08) — www.litime.com
• Victron Blue Smart IP65 12/15 120 V: Li-ion 14.2 V absorption, no float, 13.5 V storage; 15 A / 4 A; Li-ion battery range 30–150 Ah; full output to 30 °C; 100–130 VAC input (read 2026-11-08) — www.victronenergy.com
• Victron manual: automatic UVP reset for Li-ion, no Li-ion charging below 0 °C, no temperature compensation in Li-ion mode (read 2026-11-08) — www.victronenergy.com
• Victron Li-ion charge-time example: 100 Ah on 10 A, 9.5 h bulk plus about 0.5 h absorption (read 2026-11-08) — www.victronenergy.com
• Victron Blue Smart IP65: 5-year warranty, revives batteries from 0 V (read 2026-11-08) — www.victronenergy.com
• Victron Blue Smart IP65 12/15 120 VAC (BPC121531104R): $175.95 (read 2026-11-08) — www.solar-electric.com
• NOCO GENIUS10: $99.87 as of 2026-11-08, 10 A, 12 V lithium mode, 3-year warranty, per Clamp & Crank (read 2026-11-08) — clampandcrank.com
• NOCO GENIUS10 measured by Auto Median (Chris Perling): about 14.2 V top-off and about 13.6 V hold on a 20 Ah LiFePO4; Force Mode bypasses battery detection (read 2026-11-08) — automedian.com
• Redodo 12V 100Ah low-temp battery: charging stops below 32 °F and resumes above 41 °F (read 2026-11-08) — www.redodopower.com

Published 2026-11-06; updated 2026-11-12. The buy links are affiliate links; see the disclosure. Corrections welcome at [email protected] or /feedback.