Amazon Basics Battery Charger 12 Volt 800mA, currently $13.10 but I see the prices fluctuates rapidly.
https://www.amazon.com/dp/B07TTNV9LZ
Used for charging and maintaining a long term float on lead-acid batteries. 12volt 800mA
- Battery charger for cars, motorcycles, boats, and more; fully charges and maintains the appropriate storage voltage
- Compatible with lead acid, absorbed glass mat (AGM), and gel type batteries; fused alligator clips for easily connecting to a battery
- Plugs into a 120V outlet and outputs 12V at 800mA; spark proof with reverse polarity protection (will not supply power unless the connection is correct)
- Made of durable plastic material in a sleek black color; includes a fused ring terminal harness; for use indoors, in a garage
- Backed by an Amazon Basics 1-year limited warranty
Similar to the Battery Tender Junior.
I browsed through the Amazon reviews. There are some reviews related to quality issues but there are a lot of 1 star ratings from people that were confused on what this product is intended for and/or they were attaching this to batteries that were beyond their useful life.
These devices will "charge" some partially dead batteries but is mainly for topping off and maintaining a float charge on a healthy battery. Ideal for lawn/garden and car batteries that sit for long periods of time where a float charge is beneficial.
https://www.amazon.com/dp/B07TTNV9LZ
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it's not worth the effort vs the amount of time it takes to plug and unplug the unit versus the benefit of the charger.
if you have to use this to maintain the charge of your battery to maintain good working order, then you have bigger problems than the effectiveness of this so called battery charger/maintainer.
A float charger is a perfectly valid common thing to use on lead acid batteries. They've been around as long as lead acid batteries have been around. A float charge on a lead acid battery is the ideal condition to long battery life. I have batteries that sit for months without use. Connected or disconneted, doesnt matter. A maintainer is the perfect thing for them. A battery that is left to go dead will have a shortened life span even if it is charged later. Even worse when it happens in the cold winter. Do that a few times and that battery will be useless in 2-3 years instead of 5-7.
Not everyone needs one but they have a valid purpose for those that do.
A float charger is a perfectly valid common thing to use on lead acid batteries. They've been around as long as lead acid batteries have been around. A float charge on a lead acid battery is the ideal condition to long battery life. I have batteries that sit for months without use. Connected or disconneted, doesnt matter. A maintainer is the perfect thing for them. A battery that is left to go dead will have a shortened life span even if it is charged later.
Not everyone needs one but they have a valid purpose.
A float charger is a perfectly valid common thing to use on lead acid batteries. They've been around as long as lead acid batteries have been around. A float charge on a lead acid battery is the ideal condition to long battery life. I have batteries that sit for months without use. Connected or disconneted, doesnt matter. A maintainer is the perfect thing for them. A battery that is left to go dead will have a shortened life span even if it is charged later.
Not everyone needs one but they have a valid purpose.
It is very hard to isolate where this drain is coming from. Very expensive.
So if you have a car or something else you do not use that much this makes sense.
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