Revive & Maintain
Lead acid
smart charger
Keeps a stored 12V lead acid battery full all season, then hands it back ready to start. Clip it on, plug it into any USB-C charger, and walk away.
- Output
- 12V, 1.2 A
- Input
- USB-C
- Size
- 56 mm
- Ships across the US and Canada
- Secure checkout with card or PayPal
- Not sure it fits? Ask us before you buy
Product description
Batteries die in storage because they slowly drain and nobody tops them up. This charger brings a 12V flooded, gel or AGM battery up to full, then holds it there with small top-ups for as long as the vehicle sits.
Good for
- Motorcycles and scooters
- Boats and jet skis
- ATVs and UTVs
- Classic and weekend cars
- Lawn tractors and ride-on mowers
- RV and trailer starting batteries
Is it the right one?
Look at the battery's own label. AGM, GEL, SLA, flooded or "maintenance free" all mean lead acid, and this is the right charger. If it says LiFePO4 or lithium, choose the Lithium Smart Charger instead.
- Batteries
- 12V flooded (wet), gel and AGM
- Output
- 12V, 0.75 to 1.2 A
- Power input
- USB-C, PD and QC compatible
- Size
- 56 mm
- Weight
- 180 g
- BMS wake-up
- Not needed for lead acid
- Label
- Green label, marked WET / GEL / AGM
- In the box
- To confirm from the packaging
- Warranty
- To confirm with Chargewise
- SKU
- CW-12V-LA
How it works
Three steps in the fall. Nothing to do until spring.
- 1
Connect it
Attach the output lead to the battery: red to positive (+), black to negative (−).
- 2
Plug in USB-C
Use a USB-C PD or QC power source: a wall charger, a power bank or a vehicle USB-C port.
- 3
Leave it
It charges the battery to full, then switches to maintaining. Leave it connected until the season starts.
Running lithium instead?
Lithium
smart charger
Made for 12V lithium-ion and LiFePO4 batteries. It charges to full, holds the battery there, and wakes a battery whose BMS has shut it off.
Questions before you buy
Can't find your answer? Ask us and a real person will reply.
Which charger do I need?
Check the label on the battery. AGM, GEL, SLA, flooded or "maintenance free" means lead acid. LiFePO4 or lithium means lithium. Both chargers are 12V only.
Can I leave it connected all season?
Yes. That's what it's for. Once the battery is full, the charger switches to maintaining and only tops it up as it drains.
What USB-C power source does it need?
Any USB-C charger or power bank that supports PD or QC fast charging. Most modern phone and laptop chargers do.
Will it work on a 6V or 24V battery?
No. Both chargers are made for 12V batteries only.
What vehicles is it for?
Anything with a 12V battery that sits for weeks or months: motorcycles, boats, jet skis, snowmobiles, ATVs, RVs, classic cars and lawn tractors.
Do you ship to Canada?
Yes. We ship across the United States and Canada.
We're here to help
Contact us
Not sure which charger fits? Send us the battery model.
Get in touchShipping and returns
Delivery times across the US and Canada, and how returns work.
Shipping detailsWarranty
What's covered and how to make a claim.
Warranty detailsUser guide
Connecting, charging and what the light on the charger means.
Read the guide