*** UPDATE March 2023 ***
I had to leave my car alone for a little over a month, and I could barely start it. Voltage was showing 12.1v. I ran the ADPOW for 12 hours straight, during which it showed a "recondition" mode. Well, after it finished, it showed 12.7v! However, I knew this wouldn't last. But resting voltage settled at 12.55v. That's really good, for a 6 year old AGM battery that has suffered a few deep discharges. The ADPOW has saved me again!
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*** UPDATE April 2022 ***
So my last update was 2 years ago. Guess what? I'm still running the same battery! And my estimate on how much charge it was holding was off a bit. It seems to be more like 80%. I haven't been driving much these days (COVID pandemic changed things) and at one point I'd let two period of two full weeks without running my car. The battery was showing a low charge--still enough to start, but I knew it was time to refresh it. I ran the ADPOW charger again on it. Performance is back up to par. A month later and my multi-meter checks of the battery show I'm averaging around 12.50 volts. Hopefully I can go another year or more with my current AGM battery.
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*** UPDATE Nov 7th 2020 ***
My worn down AGM battery is still working fine. It's still holding about a 75% charge. I haven't had to run the battery charger since the last time when I wrote this review. So far so good! This was an excellent investment as it saved me from having to buy a brand new battery right away. I hope to get another year out of it, maybe more. Will report back again in due time.
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I was discouraged by all the crazy looking car battery chargers / maintainers appearing on the market (most from unfamiliar Chinese names), many having suspiciously positive reviews. On top of that, old stalwart US brands like DeWalt, Black & Decker, and Stanley were coming up short of good solid reviews. So I took a chance on this particular "Smart Battery Charger" by ADPOW (short for "Add Power").
1), the photos on the site do not do the unit justice. The wires are a solid 8 gauge in thickness. The connector setup is intelligently thought-out. The unit has a good heft without being too heavy, and it does not get overtly warm during use. The front panel with LED indicators is clean & tight.
2), the function design of this smart battery charger is perfect for consumer needs. I had been tempted to get a full fledged testing charger with all kinds of analyses possible. After doing enough research, I realized all of that would be lost on someone who is a simple car enthusiast. This charger does all you need it to do -- verify the battery is healthy & charge it up at a reasonable pace. The connector setup allows for the attachment of a special connector which is very handy if you plan on using this charger more than a few times each year. It makes attachment so very easy. Plus the unit has mounting holes so you can affix it to a wall or panel in your garage for convenience.
Thirdly, it helped recover my car battery to a more workable state. It is a 3 year old AGM type and it gradually struggled under my infrequent usage of the car since I got it (not using the car for daily commuting, as I used to in the past). When I spent a weekend installing a new car stereo system, using the cabin light for hours and running the stereo for a while without the car running knocked the battery down for the count. It couldn't start the car. I did get a jump start and ran the car for a while, restoring decent voltage. It was working OK. However, I found that the battery was trending towards a resting voltage of 11.9v. At 11.5v it will not have enough power to start, so this was not good.
The ADPOW unit cleared my battery as initially OK, started bulk charge, then after about 20 mins switched to absorption charge (meaning a lower steady constant voltage). My multi-meter confirmed the unit was delivering 14.5v, the same you'd get from the car's alternator. After about 4 hours, the charger switched to "Recondition." I had expected this, since the battery had suffered a deep discharge. My multi-meter showed the input voltage from the ADPOW stepped up to 15.5v. At the end of another 4 hours, the "FULLY CHARGED" green indicator lit up. I tested the voltage of the battery and it initially showed 13.6v. After letting it sit for a day, I found the charge was resting at 12.25v. That's not a healthy battery (60%). 12.32v is 70%, 12.42v is 80%, 12.5v is 90%, and 12.7v is 100%. So I ran the charger again. It again went to recondition, but it took half the time. After this, resting voltage showed 12.45v. After driving the car and letting it sit for a day, it showed 12.35v. So my battery is now about 75% of original capacity, but still workable. I'll likely need to replace the battery towards the end of 2020, so the ADPOW charger saved me from having to replace it right away.
I'm very happy with the design & performance of this unit. It's small enough to stow in your car's trunk or storage bin. I consider it a worthwhile investment for a reliable battery for its maximum life. By the way, do not skimp on your battery. It's worth spending more to get an AGM type. They are more robust and longer lasting than typical lead acid car batteries.
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Product Description
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Saftey is the 1st priority! It is the most important design concept of ADPOW smart battery charger which provides the whole charging process with overcharge protection,reversed hook-up protection,and overheat protection.
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ADPOW smart battery charger fits most commonly used batteries with diversifed battery campacity, varied battery chemistries,and different battery terminals.
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Compare with similar items
This Item  ADPOW 5A 12V Automatic Smart Battery Charger Automotive Maintainer 7-Stages Trickle Charger for Deep Cycle Battery Car Marine Trolling Motor Boat Truck Lawn Mower RV AGM with Terminal Cleaning Brush |  |  |  |  |  | |
| Price | $36.99 | -7% $7.42 List: $7.98 | $55.99 | $29.99 | $49.99 | -31% $24.99 List: $35.99 |
| Delivery | Get it as soon as Monday, May 13 | Get it as soon as Tuesday, May 14 | Get it as soon as Tuesday, May 14 | Get it as soon as Wednesday, May 15 | Get it as soon as Monday, May 13 | Get it as soon as Monday, May 13 |
| Customer Ratings | ||||||
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| Value for money | ||||||
| Safety Features | ||||||
| Sold By | PY Store | RQMaiqin | Guanye | XingOuji | ECO-WORTHY US | Smileshopper |
| output voltage | — | 12 volts | 24 volts of direct current | — | — | 24 volts of direct current |
| input voltage | 12 volts | 240 volts | 120 volts of alternating current | 240 volts | 240 volts | 240 volts |
| battery charge time | — | 15 hours | 24 hours | 60 hours | — | — |
| weight | 1.5 pounds | 106 grams | — | 0.64 kilograms | 0.45 kilograms | 1.1 pounds |
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12v 5A car battery charger
PY Store
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I like it so far.
So far so good. I plug it in when the car is not in use which is most of the time. I have AGM battery. I would of opted in for the bigger powered model as sometimes I vacuum or run accessories for a short time but the 5A one I got, it keeps up with the small demands when the car is off.
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