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MOTOPOWER

MOTOPOWER MP00205A 12V 800mA Automatic Battery Charger, Maintainer, Trickle and Desulfator

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Availability: Only 10 left in stock, order soon!
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Arrives Thursday, Oct 22
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Features

  • Charger, Maintainer & Desulfator - An all-weather battery charger, battery maintainer, trickle charger, and battery desulfator. Perfect for charging and maintaining all 12-volt lead-acid, flooded or sealed maintenance free batteries (AGM and gel cell).
  • Automatic Desulfation & Optimization - Automatic detection of battery sulfation problem. Applying with pulse current technology to desulfate the batteries effectively. Optimize the battery performance during charging without any manual operation.
  • Energy Saving & Spark Free - Zero output in standby mode. No battery drain when connecting with the battery. Spark proof during lead connection for safety.
  • Easy Operation -Just plug-in, connect to the battery and start charging or maintaining your battery. The desulfation is working automatically during the charing. No manual operation.

Description

Visit our store for more products MOTOPOWER is the direct manufacturer specializing in the eletrical products and accessories for automotive and powersports industry, such as battery chargers, battery testers, diagnostic tool, cell phone chargers, cables and more. All the products are designed, produced and sold directly by MOTOPOWER. Get the best products here at the most competitive cost directly from MOTOPOWER store on Amazon. Ensuring compatibility and understanding the long-term effects of charging at a lower amperage can enhance your device’s performance and longevity, fostering more reliable and stable energy usage over time. Prolonged battery life due to reduced thermal impact and stress. Lower amperage results in less heat, minimizing the risk of thermal damage. The reduced current minimizes the heat produced during charging, which is a major advantage in maintaining battery integrity. Avoid overheat risks. Make sure Safe Charge. Slower charging can prevent overcharging and preserve battery capacity over time. Make sure the charging efficiency of the charging process. The battery can store the charging power in 100%. The big current will damage the cells, no full charge and reduce battery life. Pulse current applied for batteries between 4 - 8volts. Increase the battery voltage gradually to optimize the cells and restore their best performance. Force pulse current in the absorption stage to desulfate the cells. Removing the troublesome crystals and absorb into the charge cycle. Maintain the battery with float current close to 0.1 - 0.5amp and keep the battery at 13.6V+/-0.2V indefinitely. Restart charging when voltage drops. Five CHARGING STAGES - Diagnosis, Soft Start, Bulk Charge, Absorption and Float/Maintenance. Bring the batteries to back to life. No output without load. No battery drain when connecting with battery. Spark free for safety. Sulfation detection and repair cells damage. Optimize the battery chemistries. Stable performance for any climate. Low temperature activation. 24-hour absorption/desulfation. Stop automatically when fully charged or when time's up. Product Features: The MP00205A 12V 800mA Battery Charger allows you to connect the charger to the battery and leave it for maintenance indefinitely. Once the battery has reached a 100% charge, the chargers will automatically switch it's output voltage to a safe, storage/float level (13.6V+/-0.2V) that eliminates the need to worry about the damaging effects of overcharging. Pulse Current Recovery Mode: In the Absorption Mode, the charger will give a 0.5Amp pulse current to charge and recover the battery until it's fully charged. In this stage, the charger will decrease the battery sulfation and improve the battery performance gradually. For several times charging, you will find the battery internal resistance is lower and the performance is improved. Technical Details: - Input Voltage: 100-240V AC / 60Hz. - Output Voltage: 12 Volts DC @ 800mA - Charged Voltage: 14.2+/-0.2 Volts - Maintenance Voltage: 13.6+/-0.2 Volts - Activate Voltage: 4Volts Package Includes: - Battery Charger x 1 - SAE Alligator Clamp Cable x 1 - SAE Eyelet Terminal Cable(7.5A fused) x 1 - Instruction Manual x 1

Brand: MOTOPOWER


Color: Black


Product Dimensions: 2"D x 4.1"W x 1.5"H


Item Weight: 300 g


Output Voltage: 12 volts_of_direct_current


Output Voltage: 12 volts_of_direct_current


Input Voltage: 110 volts_of_alternating_current


Current Rating: 800 milliamps


Amperage: 800 milliamps


Compatible Devices: Cars, Motorcycles, ATVs, RVs, Powersports, Boats


Connector Type Used on Cable: clamp/alligator clip


Number of Ports: 1


Item Dimensions D x W x H: 2"D x 4.1"W x 1.5"H


Item Weight: 300 g


Specification Met: CE, FCC, ETL, RoHS, UL


Color: Black


Brand: MOTOPOWER


Mfr Part Number: MP00205A


Global Trade Identification Number: 17


UPC: 709046785017


Number of Items: 1


Manufacturer: MOTOPOWER


Number of Packs: 1


Unit Count: 1 Count


Built-In Media: Battery Charger/Maintainer, Alligator Clamp Cable, Ring Terminal Cable, Instruction Manual


Model Number: MP00205A


Warranty Description: 2 year manufacturer


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Oct 22

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • Excellent Slow Trickle Battery Charger and Maintainer
Color: Black
I bought two of these battery maintainers to keep the batteries charged in my garaged cars and lawn tractor mower during the winter and they both work very well. Both of them keep the batteries charged and they perform a trickle charge so you do not have to worry about over-charging your battery. My only minor complaint is that I wish they had an on/off switch but I assume the engineers of the product designed it that way to ensure a charge whenever it is plugged into the AC outlet and I assume it would cost more than $14 bucks to do so. This is not a big problem because I plug them into a surge suppressor and that acts as an on/off switch. I just don't like having to unplug a device from the AC outlet in order to turn it off. I give this product 5 stars because it works very well, is durable, and dependable. ... show more
Reviewed in the United States on July 2, 2026 by Amazon Shopper
    • Quality
Color: Black
Very pleased with the charger. Quality appears to be very good, unit is small and easy to handle. Shipping was fast and efficient!
Reviewed in the United States on August 10, 2026 by Bill Mays
    • It’s an inexpensive well made trickle charger that’s easy to use
Color: Black
Great charger and does its job ! I use it to maintain the battery for my 4 wheeler while in storage. I like that it automatically will switch to maintain the battery when it’s at capacity. It’s extremely easy to use you just attach it to the correct terminals and it’s doing its thing. It was inexpensive and good quality I definitely recommend it. ... show more
Reviewed in the United States on July 27, 2026 by T
    • Keep expectations reasonable, maybe do a little DIY modding, and it's a great purchase
Color: Black
Review Image by B. Clay Miles
Review Image by B. Clay Miles
Update 22 June 2024: five down to three was too harsh. It was extremely inexpensive and served well for four years. After searching (endlessly) for an appropriate replacement, I ended up buying another MotoPower unit - their 1.5a version. I figure a device with a little more heft probably won't generate as much heat as this one did, so may last even longer; and it was barely more than what I paid for the first one! Update 19 June 2024: After almost exactly four years in service, The charger died. Wife smelled the acrid scent of burnt out electronics and alerted me to it. It was in use daily for all four years. A while after the narrative below, I had set up a Raspberry Pi to monitor the battery voltage and turn this on when it reached a certain threshold - the backend story is the 2018 Honda Accord has a nasty parasitic draw problem, so it was necessary to alway have it monitored and charged cyclicly. So it was powered on and off from a few times to maybe ten times a day. However, a charger like this is _not_ a complex device; exactly four years of service strikes me as 'planned obsolescence'. So I'm dropping the rating from five stars to three stars. It is not hard to build simple electronics to last decades. There's just no good excuse for a short life - other than to 'encourage' a new purchase. Here's my tale: After a couple of months of driving my car barely once a week during the COVID-19 isolation orders, my 2018 Honda Accord wouldn't start. Tried a jump start from wife's 2002 Honda Civic - still no go. yikes! Got out the decent quality multi-meter I have - less than 8 volts, from a 12V battery. Double yikes! Checked the electrolyte - whoa, one of the six cells had exposed plates. Well, that fairly well explains the very low volts. Topped it up to the line, then tried jump start again...yep, triple yikes. Well, I had plenty of time on my hands being furloughed, so I ordered this little unit. Inexpensive, but it made appropriate promises for what it can do, for what it costs. Ratings good. Some horrible though. Took the chance. At 800mA, this is not going to charge a 500Ah car battery quickly. I hooked it up and monitored the voltage for several days. Weather was rather warm, 80's to 90's F, and I noticed this little device getting pretty darned hot - too hot, in fact. Disconnected it and took off the back plate. Board very hot to touch, capacitor and transformer too hot to touch. Bad design! This thing needs to either be potted with a non-conductive heat sink material for full contact with the inside of the case, or the case needs vents. Period. That much heat will toast those components over time. True - I was asking the device for all it had - to charge a pretty deeply discharged 12V high amp capacity battery. Which isn't _per se_ its intended function. Still though. I decided to DIY. Took a drill and drilled four holes in the back plate, and two holes on each side, see photos. Pretty? Not on your life. Crude but fairly effective? Yes indeed, at least, it allowed _some_ of that heat to dissipate. Eventually there was enough charge to start the car, took it for a long drive, then hooked it up again to see if it would complete the full cycle - which it did after another day. It eventually hit the couple of voltage marks to go into absorption mode, then into float mode. Highly accurate too - 14.19v - still absorption mode. 14.20v - boom, float mode. Repeatable. For twenty bucks, it did what I wanted - and most importantly, what I _expected_ - unlike some of the reviews that complain it took days to charge their battery...well duh! It puts out less than an amp, expecting a fast charge from a slow charge device is just....dumb. That said - please guys - make the 'slotted' sides into real slots, to let some air flow through it. I realize it adds a little to the manufacturing costs, but people will get a longer life out of their (admittedly tiny) investment in this - and maybe fewer will die out in the field, eliciting bad reviews. As for me, I'm very happy with it - because it met my expectations. ... show more
Reviewed in the United States on June 6, 2020 by B. Clay Miles
    • Great bang for the buck
Color: Black
I have another Motopower battery maintainer that I really like so when it was time to buy another one for my motorcycle, I went with this one. Motorcycle batteries are expensive and don't tend to last very long so I do everything that I can to extend their life. I'm not sure if the desulfation feature does much to extend life on a battery that is properly cared for, but I DO know that keeping the battery trickle charged-- especially over the winter-- is essential. Discharging a battery can permanently reduce its capacity, and even if it takes a charge again, it may never be the same. Whenever I come home from a ride, my motorcycle gets plugged into the battery maintainer. I'm not worried about the battery getting discharged during a ride because the motorcycle's charging system will keep it topped up. However, I AM worried about the battery gradually discharging if the motorcycle sits for days or weeks. Keeping it plugged in when I'm not riding prevents this from happening. Mine is permanently installed, which entails connecting the pigtail with the ring terminals to the battery. This is straightforward but routing the cable to a place where you can reach the connector may be difficult, especially on a motorcycle with lots of fairings (IE sport bikes). I bought my bike with a pigtail already installed so I got lucky, but I did have to verify that the polarity is correct (it was). The charger should have reverse polarity protection, but I wouldn't count on it to save me. I checked before plugging it in for the first time. If you haven't done so already, I strongly recommend getting a cap for the pigtail on your motorcycle and capping off the pigtail whenever the charger is not plugged in. This will prevent water, road salt, debris, etc. from getting into the connector, which can cause corrosion. I also put a small dab of dielectric grease in the plug about once a season, which makes it easier to plug and unplug the charger and protects the terminals a bit. Overkill probably but easy enough to do and gives me peace of mind. I also add some dielectric to the ring terminals before installing on the battery to keep corrosion at bay. I have a motorcycle battery that is going on its third year with me and an unknown number of years with the previous owner. I have no idea how long it will last, but I DO know that it's keeping the battery alive longer, especially during the winter months. The last motorcycle battery I bought was right around $100. At that price, this charger is cheap insurance. ... show more
Reviewed in the United States on August 17, 2026 by Zero Signal
    • Very nice!......Many Thanks!..... and Good Day!......
Color: Black
Review Image by denny
MOTOPOWER MP00205A 12V 800mA Automatic Battery Charger, Maintainer, Trickle and Desulfator. Very Nice!.......
Reviewed in the United States on September 13, 2026 by denny
    • Reliable Little Charger That Gets the Job Done
Color: Black
The MOTOPOWER MP00205A is a solid, no‑nonsense battery maintainer. It’s lightweight, easy to hook up, and perfect for keeping a 12V battery topped off on my motorcycle. The automatic shutoff and trickle‑charge features work smoothly, and the desulfation mode adds extra value for my older battery. It’s not a fast charger, but as a steady maintainer, it performs exactly as advertised. ... show more
Reviewed in the United States on August 30, 2026 by H. Marks
    • Died after two and a half years for no reason
Color: Black
Worked great for two and a half years, and then just stopped working randomly.
Reviewed in the United States on July 9, 2026 by Jeremy Schow

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