Best 12v 20ah Lithium Battery Deals Online in the UK (25 Deals Found)

Last Updated - 29/10/2026 Sort By:

Best Choice
HumsiENK

New
HumsiENK 12V 20Ah LiFePO4 Lithium Leisure Battery 256Wh Capacity, BMS 20A with Low-Temperature Protection,10-Year Servic
🔋 【Deal: Lead-acid Battery Alternative – Compact & High-Performance】 Measuring only181mmx167mmx77mm, the HumsiENK 20Ah

£54.99
UPLUS NEW TECHNOLOGY BATTERY

New
UPLUS LP12-20 12V 20Ah Rechargeable Deep Cycle AGM Battery M5 Terminal
Battery Dimensions: 181.5L*76.5W*167.5H (mm) Terminal Layout:Left: + Right: -. replacement for BB HR22-12, BC20-12, BP20

£45.99
New
WattCycle 12V 20Ah Lithium Battery LiFePO4 Rechargeable Deep Cycle BMS Home RV
WattCycle 12V 20Ah Lithium Battery LiFePO4 EV Grade A+ Cells Boat Camper Caravan. A wide temperature range (-4°F to 158°

£61.99
14% Off
DREAMDASH

New
12V 20Ah LiFePO4 Battery Lithium Rechargeable, Life Span > 3000+ Cycles
【Save Money for a Decade】Engineered for over 3000 cycles (up to 15,000!) and a 10-year lifespan. Drastically reduce repl

£59.99 £69.99
New
Scooter Battery 12v 20Ah Lithium BMS with 12v Charger for Finshfinder Baitboat
12v 20Ah lithium-ion battery X 1. NCM is a type of lithium and is a 11.1v battery vs 12.8v of LiFePO4. This battery has

£84.99
Best Value
ECO-WORTHY

New
ECO-WORTHY 12V 30Ah Lithium Battery with BMS Protection
Long service life: Lead-acid batteries usually only last for 300-400 cycles, while our lithium-iron batteries can contin

£69.99 £94.99
Wattcycle

New
WattCycle 12V 20Ah Lithium LiFePO4 Deep Cycle Battery, EV Grade A+ Cells, Rechargeable Battery Built-in 20A BMS, Lightwe
🍃-The compact design of our 12V 20Ah lithium iron phosphate batteries makes them only 7.28*3.3*6.06 inches and weigh on

£65.99
New
Humsienk 12V 20Ah LiFePO4 Lithium Battery 15000+Cycles for Wheelchair Toy Cars
12V Battery. Weighs only 5.73 lbs—making it easy to transport and install. 24V Battery. 36V Battery. 48V Battery. 5-Year

£169.99
SuperBatt

New
SuperBatt SB12-20 12V 20AH (17AH 18AH 19AH 22AH) Sealed Rechargeable VRLA AGM Battery
SuperBatt SB12-20 VRLA AGM Battery (Valve Regulated Lead Acid Absorb Glass Mat)

£35.99
New
12V 20Ah Lithium Battery LiFePO4 Rechargeable Deep Cycle BMS Home RV Boat Solar
Specification Cell Type: LiFePO4 battery Standard Voltage: 12.8V Standard Capacity: 20Ah Total Energy: 256Wh Standard/Ma

£79.95
UPLUS NEW TECHNOLOGY BATTERY

New
UPLUS 12V 20Ah 282A CCA motorcycle Battery UP12-20P, Replaces PC680
𝗦𝗽𝗲𝗰𝗶𝗳𝗶𝗰𝗮𝘁𝗶𝗼𝗻: Dimensions:181.5L*77W*166H(mm) Weight:6.9kg Configured with standard T12 Terminal. ※Note: Pl

£39.99 £43.99
10% Off
ECO-WORTHY

New
ECO-WORTHY 12V 8Ah Lithium LiFePO4 Battery with 5A BMS for Fish Finder
Wide Application:LiFePo4 lithium battery is the most stable battery and it is compatible for RV, caravan, marine, camper

£35.99 £39.99
New
Humsienk 12V 20Ah LiFePO4 Lithium Battery 6000+ Cycles Toy Cars Wheelchair
12V Battery. Weighs only 5.73 lbs—making it easy to transport and install. 24V Battery. 36V Battery. 48V Battery. 5-Year

£58.99
DC HOUSE

New
DCHOUSE 12V 30Ah Mini LiFePO4 Battery with DC Port & Low Temp Cut-Off
[Small Size and Ligh Weight] The 30Ah lithium battery weighs only 6.61 lbs, which is only 1/3 of the weight of a lead-ac

£76.99 £79.99
New
LiFePO4 12V 20Ah Lithium Battery BMS Deep Cycle Boat RV Camping Solar Generator
Voltage 12.8V Cell type LiFePO4 Capacity 20Ah Discharge temperature -20°C -60°C Total energy 256Wh Charging temperature

£78.90
Generic

New
2 x LUCAS Mobility Scooter Batteries. 12V 20Ah
2x 12V 20Ah Batteries

£76.99
New
Lithium Golf Battery 3 Pin connector Pro Rider Ben Sayers Stowamatic 12V 20Ah
12V – 20Ah LiFePO4 Grade Lithium. Capacity: 20Ah. Lightweight Lithium Power for Pro Rider & Ben Sayers Style Golf Trolle

£119.99
New
Humsienk 12V 20Ah LiFePO4 Lithium Battery 6000+ Cycles Toy Cars Fish Finder
Weighs only 5.73 lbs—making it easy to transport and install. 12V Battery. 24V Battery. 36V Battery. 48V Battery. 5-Year

£58.99
New
LiFePo4 Battery 12.8V Lithium-Ion Iron Phosphate 12V Deep Cycle Heavy Duty
Our Energiestor Lithium LifePO4 batteries have double the usable power compared to Lead Acid Batteries and only half the

£58.09
New
ULTRAMAX Neo 12.8V 20Ah LiFePO4 Lithium Battery UPS Marine Alarm Backup Power
Lightweight & Compact Design – Space-saving 12.8V 20Ah battery (151 × 98 × 98 mm) with significantly reduced weight comp

£247.99
New
Renogy 20Ah 12V LiFePO4 Lithium Battery w/BMS IP65 for Trolling Motor and Marine
Renogy 100/200/300Ah 12V LiFePO4 Lithium Leisure Battery or Battery Monitor. Renogy 300Ah 12V LiFePO4 Lithium Battery 50

£79.99 £99.99
New
Lithium Battery 12V 20AH LiFePO4 BMS Emergency Storage Power RV Solar Camper ATV
Voltage 12.8V Cell type LiFePO4 Capacity 20Ah Discharge temperature -20°C -60°C Total energy 256Wh Charging temperature

£78.90
New
Lithium Leisure LiFePO4 Battery 12V Iron Phosphate Deep Cycle Motorhomes Camper
Our Energiestor Lithium LifePO4 batteries have double the usable power compared to Lead Acid Batteries and only half the

£58.09
New
12V 20Ah Lithium LiFePO4 Battery Deep Cycles Low Temp Solar Off-grid RV Caravan
Voltage 12.8V Cell type LiFePO4 Capacity 20Ah Discharge temperature -20°C -60°C Total energy 256Wh Charging temperature

£78.90
New
LITHIUM LIFEPO4 UPGRADED MOBILITY SCOOTER BATTERIES 12v -20AH as 17AH 18AH 22AH
FITS UPGRADED BATTERY BOX FOR 17AH 18AH 20AH 21AH 22AH BATTERIES. · Each Battery = Battery Capacity = 20AH. 2 x 12v 17AH

£249.99

25 12v 20ah Lithium Battery deals are available from: Amazon, eBay stores, starting from £35.99.
The biggest discount we found is 26% on ECO-WORTHY 12V 30Ah Lithium Battery with BMS Protection at Amazon.
The lowest price we found is £35.99 while the highest is £249.99.
Prices for the best 12v 20ah Lithium Battery deals average at £85.15.
Last updated on October 29, 2026.
We scanned these quality online stores and more to deliver you with the best offers online available for 12v 20ah Lithium Battery.