How to Charge a Bad Battery (not really bad, but computer says is bad)


Often times a computer controlled battery charger will determine a battery is bad after the battery has been fully discharged and the lead plates in the battery are sulfated. You can often times rescue the battery by using a 1 amp manual charger, and slowly charging the battery back to life. It can sometimes take the 1 amp charger 24 hours to bring the battery back to a point where the computer controlled battery charger will accept the battery and charge it.

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6 Best Car Battery Charger to Buy

6 Best Car Battery Charger to Buy

🛠Updated Ranking👉🏼 👉🏼


Best Car Battery Chargers Buy in 2017

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Want To Buy The Best Car Battery Chargers? Watch This Video About The TOP 5 Best Car Battery Chargers + Check The Description For Reviews & Prices!

Here are the list of each product name that I included in this video.

05. 12V .75A UltraSafe Smart Battery Charger

04. Schumacher SE-1052 50

03. Schumacher SC-1200A

02. Battery Tender Plus 021-0128

01. Schumacher SE-4022 2


Black & Decker Lithium Battery Charger Not Working Troubleshooting

Black & Decker Lithium Battery Charger Not Working. No lights no output. Weed wacker or yard trimmer & Blower operate with these batteries. Trying to trouble shoot & repair. Looking for a possible quick fix.


Review 2 Amp Waterproof Automatic Battery Charger $16 from Black & Decker

Got this charger for $16 because the protection of my battery is worth it. This Black & Decker 2 amp battery charge will save me $100s not having to replace my marine battery in the boat as often.

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Black & Decker BC2BDW 2 Amp Waterproof Charger/Maintainer
Never wake to another dead battery!
Everyone knows the frustration of waking to a dead battery. Make sure it never happens again with the Black & Decker BC2BDW, one of the best-rated charger/maintainers on the market.

Waterproof applications
With Black & Decker’s unique waterproof battery charger system, now you can charge your batteries anywhere, including outside in the elements and even on your boat without worry of an accident. And because this is a high-frequency battery maintainer, the charger can be left connected for any length of time, allowing you to continuously maintain a charge on all of your batteries, including lawn mowers, motorcycles, and even boats or personal watercraft.

Worryproof charging.
The BC2BDW is completely automatic and was designed specifically to take the worry out of charging. Included are three different types of connections, including battery clamps, battery rings for a more secure connection to battery terminals, and a 12-volt DC plug. The charger also has a built-in AC low voltage compensation to ensure maximum performance when used with an extension cord and includes built-in circuit protection guards against overcharging, reverse polarity or short-circuiting.

2 amp battery charger/maintainer is compatible with any AGM, GEL, or WET automotive or marine 12V battery
Fully automatic high frequency charging; AC low-voltage compensation ensures maximum performance when used with extension cords
Features an IP67 rating which certifies a completely sealed, waterproof and dustproof housing capable of withstanding direct water or rain exposure
Built-in circuit protection guards against overcharging, reverse polarity, and short-circuiting; ETL Certified for performance and safety
Offers 3 ways to connect: 12V DC accessory plug, battery clamps, or battery terminal rings; Hanging hook and magnetic backing allow for convenient, hands-free operation


Top 10 Best Battery Charger Reviews – Battery Charger for Car

Thanks for watching Best Battery Charger Reviews – Car Battery Charger for winter storage, flat battery

Get the latest updates on car battery charger price info and reviews:


#10 Battery Tender 021-0156 Battery Tender Plus 12V Battery Charger True Gel Cell Model B000NCOKQK

Works well with Gel batteries and others.
Works great for maintaining battery in storage.
It doesn’t get too hot, compact and efficient.
Appears to be high quality construction and materials.
Seems to work fine for my scooter battery (GEL) and my car batteries (REGULAR)

#9 Battery Tender 022-0148-DL-WH 12-Volt 4-Bank Battery Management System B000CIPHUI

It even “repaired” some old batteries through its careful application of power.
It is also great for riding lawn mowers, ATV, and off road vehicles.
Nice unit works flawlessly
keeping my three boat batteries fully charged.
If your batteries are dead, you will need to put them on a charger FIRST, before the tender.

#8 Schumacher SE-1555A Automatic Elite Wheel 12 Volt Battery Charger with Engine Start B006PAGJXQ

The digital is great to have, the unit is lightweight, and the clamps seem durable.
The digital voltmeter is accurate.
It also is nice to see battery level represented as a percentage.
The sheet metal is very thin, and the edges are sharp.
150 amp “starter” isn’t fantastic for a frozen battery.

#7 Schumacher SSC-1000A SpeedCharge 2/6/10 Amp Battery Charger and Maintainer with 50-Amp Battery Clips B0009IBJE4

A light weight and very portable battery charger.
Not recommended for permanent trickle charge mode.
The connector cables are thick enough.
the clamps have enough spring action.
Works great on Deep Cycle batteries.

#6 NOCO Genius G7200 12V/24V 7.2 Amp Smart Battery Charger and Maintainer B004LWTHP2

Smart charger. Leave it connected with no worries about over charging the battery.
Charge and optimize “bad battery”.
Light weight and portable size. Easy to store and carry around.
‘Diagnostic’ features tell the health of your battery.
Super easy to use with alot of built in safety features.

#5 Battery Tender 022-0150-DL-WH Waterproof 800 Battery Charger B000CITKCE

It took 3 days of trickling, but now the battery’s back to normal.
I also use it on my boat to charge the house batteries.
Good trickle charger. Works like a charm.
it charges slow but works perfectly.
It can load a dead battery in a couple of hours (scooter batteries).

#4 Schumacher SC-1200A/CA SpeedCharge 3/6/12 Amp Charger/Maintainer/Tester B000BQSIWK

It will not overcharge your battery.
It has a cooling fan which keeps everything cool.
It will inform you if the battery needs to be desulfated.
It monitors the temperature of the battery to keep it from becoming too hot.
Lightweight and well built battery charger.
Charge dead GTO battery with no problem.

#3 Deltran Battery Tender (021-0128) 1.25 Amp Battery Charger B00068XCQU

Extend the battery’s life and keeping it charged.
A must have battery trickle charger during cold weather.
Recommended for those that have cars that stay unused for long periods.
It’s very small size makes it extremely easy to use and store.
It has a lot of technical points that shold keep the battery happy all winter.
Use this to charge my boat battery. Weird great.

#2 Black & Decker BM3B 6V and 12V Battery Charger / Maintainer B0051D3MP6

It’s perfect for traditional sealed lead acid or wet cell batteries.
it keeps the battery at it’s top voltage all the time.
This is a great trickle charger for a generator battery,or spare car battery.
In 0 degree winter last year, kept my van’s battery parked outside from freezing.
This is an excellent, intelligent charger for your standard 12V car battery.
For a large, partially discharged battery, it does take a while.

#1 Battery Tender 021-0123 Battery Tender Junior 12V Battery Charger B000CITK8S

It Works great. Keeps the motorcycle battery charged and ready to ride.
Perfect for keeping small batteries alive.
Excellent for battery maintenance.(ATV, Motorcycles, lawn tractors, extra)
It keeps the battery fully charged, even in the coldest weather.
extend the life of your battery especially during winter.
It is maintaining my battery fine, no more dead car.

Thanks for viewing Top 10 Best Battery Charger Reviews – Battery Charger for Car


Black & Decker Maintenance Battery Chargers // Supercheap Auto

Available in Australia: NZ:
The ChargeIt range from Black & Decker features some of the most robust battery chargers on the market.

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Black & Decker BDV090 – 6V 12V Battery Charger and Maintainer

Battery Charger and Maintainer BLACK&DECKER BDV090-QS.
It works with all 6V and 12V battery types.

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– Unboxing and Overview
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How to Repair Battery Charger for Dewalt/Skill/Black and Decker. Save Money

A simple troubleshooting method to fix your cordless drill power pack without spending money. Common Issue with packs.
This fix will work on many other power tools that use a battery. Store in dry areas. Thanks for all your support!


Using a multimeter check out a drill battery charger.

Step by step how I check a charger for a battery operated drill. I will use a multimeter and a amp clamp to test the system.