While the manufacturer says the Optimate 4 is good for 2 to 50 amp-hour batteries, its low 0.8-amp peak charging rate really means it’s best suited for powersports batteries and the like, and not so great for larger car or truck batteries, although it can work on these if you have the time.

Can a battery tender ruin a battery?

Both the BatteryTender® Plus & Junior battery chargers do not turn off after they charge the battery. They automatically switch to a safe float voltage level that keeps the battery charged and yet does not do any harm to the battery.

Which OptiMate is best for motorcycle?

If your main use is for a car, OptiMate 5 or 6 would be best. To occasionally also charge a motorcycle battery, choose an Ampmatic charger like OptiMate 6 or 7. For faster charging of large batteries, OptiMate 7 will be most suitable.

Will an OptiMate charge a lithium battery?

OptiMate Lithium’s multi step charge mode is specifically designed to recharge lithium batteries to 100% and no more.

Can you use an OptiMate on a car battery?

will mainly use your OptiMate for motorcycle battery maintenance, but would like to be able to occasionally charge a car battery, an OptiMate 1, 2, 3 or 4 will be fine. Likewise if your main use is for a car and you would occasionally like to charge a motorcycle battery, OptiMate 5 or 6 would be best.

Should I use a battery tender?

At what temperature should I use a Battery Tender®? Battery Tenders® are intended more so for vehicles that will sit unused for long periods of time. They are used as a way to keep batteries charged during cold weather. That said, it is recommended you plug your car in once the temperature reaches -15 degrees.

How do I keep my motorcycle battery charged in the winter?

To keep a motorcycle battery charged during the winter, you can connect a battery tender to it indefinitely throughout the season, occasionally use a trickle charger while supervising it, or completely disconnect it and keep it inside a controlled temperature environment and charge it in the spring.