Professional-grade care for big leisure batteries. Milenco OptiMate 20 is a high-output 12V smart charger that automatically tests, saves, charges and maintains lead-acid batteries (flooded, AGM, gel, EFB). It can also act as a stable power supply for diagnostics or memory-safe work. OptiMate’s program analyses the battery first, applies recovery/desulfation if needed, then charges efficiently and switches to safe long-term maintenance you can leave connected for storage. Spark-safe with reverse-polarity and short-circuit protection, and supplied with quick-connect leads for easy hook-up in motorhomes, caravans, vans, cars and boats.
Why choose OptiMate 20
Automatic multi-stage program: test, recover/desulfate, charge, maintain
Power-supply mode for diagnostics or voltage support during ECU memory swaps
Ampmatic current control adjusts to battery size and condition
Safe to leave connected long-term; will not overcharge
Spark-safe, reverse-polarity and short-circuit protected
Clear status LEDs show charging progress and battery checks
Robust casing for workshop or touring use
What’s included
OptiMate 20 charger unit
Crocodile clamp lead (quick connect)
Fused ring-terminal lead for permanent fitment
Mains lead and user guide
Use notes
For the easiest upkeep, fit the ring-terminal lead to the battery; plug in the charger when parked.
Match polarity (red = +, black = -) and keep the unit ventilated during charging.
For long storage periods, you can leave connected; the charger will maintain safely and periodically test the battery.
Most orders are dispatched within 1–2 working days and delivered in 2–3 working days via tracked courier.
Delivery times may vary depending on your location and product type.
Please note that deliveries to Highlands, Islands, and Northern Ireland may take slightly longer and may incur additional costs.
You’ll receive tracking details as soon as your order ships.
View our full shipping policy
We want you to be completely satisfied with your purchase.
If you change your mind, items can be returned within 60 days in unused condition.
All Milenco products include a 12-month manufacturer’s warranty, with up to 5 years’ coverage on Milenco Hitchlocks for added peace of mind.
Designed and manufactured to the highest standards, Milenco combines smart engineering, durable materials and practical innovation to make life on the road safer and easier.
Every Milenco product is engineered for real-world performance — tested in the toughest conditions to ensure reliability and safety mile after mile. Trusted by caravan and motorhome owners across the UK and Europe.
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