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Grip Tools 38020 12V Automatic Battery Float Charger

Brand:| Model: 38020
Overview
Keep your stored car, boat, tractor, snow mobile, ATV, or motorcycle battery topped off with Grip Tools' 12V automatic battery charger.
Highlights
  • Trickle charge design prevents battery damage
  • Extends the life of stored 12V DC batteries will keeping them topped-off
  • Automatic shut-off circuitry
  • 12V 600mA output power
Part # 
365-008
Weight: 0.8 lbs.  
IN STOCK
List Price$19.99
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Your Price
$14.50
Buy 4-up$13.90
Part # 365-008
Qty:  EA
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Product Details

Grip Tools 38020 12V Automatic Battery Float Charger

Grip Tools' automatic 12V 600mA battery float charger keeps your car, boat, tractor, snow mobile, ATV, or motorcycle battery freshly charged while being stored. Most battery chargers provide a strong, rapid charge that tends to boil out liquids and decay electrodes; the automatic design of this charger keeps batteries topped off, while preventing damaging over-charged conditions. 

Safe for use with specialty gel cell and flooded batteries that are rated from 5 to 125 amp-hours by providing a constant, minimum current output of regulated 13.5 DC voltage. Two indicator lights show power and charging status. 80" total cable length.

Note: Remove battery to be charged from vehicle before charging. Provide battery and charger adequate ventilation. Remove battery cell caps before charging unless your battery is maintenance-free. If your battery is maintenance-free, ensure that the vents on the battery are free and clear.



Grip Tools 38020 12V Automatic Battery Float Charger
  • BrandGrip On Tools
  • Model38020
  • Part Number365-008
  • UPC097257380207
  • Product CategoryBattery Chargers
  • Unit of MeasureEA
  • Product Rating
    (4 Reviews)
  • Weight0.8 lbs.
  • California Prop 65

    Warning: California residents only. Please note per Proposition 65 that this product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

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Reviews

Grip Tools 38020 12V Automatic Battery Float Charger
Grip Tools 38020 12V Automatic Battery Float Charger is rated 4.0 out of 5 by 4.
Rated 1 out of 5 by from Worked great, while it lastedUsed this in a boombox project to recharge the 12v SLA battery (pn 140-366 ). Charger was quiet, brought the battery up to full charge initially, but died in a few days. Now it has to be uninstalled and replaced.
Date published: 2014-01-13
Rated 5 out of 5 by from Works GreatI have bought a couple of these for various projects. It works and keeps on working. What more could you ask for.
Date published: 2013-12-10
Rated 5 out of 5 by from Excellent deviceThe unit comes with useful (and amply large) jumper cable type clips on the charging leads which are properly color coded red and black- I used my charger to extend the useful life of a marginal (dying) lawn tractor battery, that is, making sure it was fully charged when attempting to start my mower. It worked like a charm. Of course eventually the battery will have to be replaced but this little gem will keep any battery fully (and gently) charged which should extend the useful service life of the battery. Worth every penny!
Date published: 2013-08-11
Rated 5 out of 5 by from What a Find !I was buying some other parts from PE, saw this charger on sale and it was so inexpensive I couldn't resist buying it. I have been using it to charge two 12 volt lead acid non-sealed batteries, one on my diesel tractor and another on my 8 KW diesel back-up generator. It works like a charm keeping the batteries charged to the right level with nothing else required but to plug it in and connect the clip leads. I can see the green charge light going on and off periodically as it keeps the correct voltage level.This is an analog charger which is perfect. The switching power supply chargers generate too much electrical noise and interference, I've read many reviews about inexpensive switching power supply chargers but from other companies and some of them complain that the chargers wipe out FM and TV reception the emitted noise is so bad. But not this one since it's analog and very quiet by design.I'm glad PE has offered it as a product. You can't go wrong at this price even if it's not on sale it's a great charger.
Date published: 2013-01-14

Product Q&A

Get your questions answered from other customers
who own this product or have experience with it.
If your question requires design or troubleshooting information,
please email tech@parts-expresss.com  for a prompt reply.
Grip Tools 38020 12V Automatic Battery Float Charger

i have a sla battery 8 amps 12v. i am making a portable stereo where i cannot take the battery out. can i install the float part into the case? other words, wall charger to male 2.5 to female 2.5 to float to battery to amp.

Asked by: packingsound
Yes this is possible although cutting the cable will void any warranty on the charger.
Answered by: MattP
Date published: 2014-08-03

Having trouble charging my 12v SLA battery. The green light comes on and then fades away quickly. Its not charging my battery at all. What gives?

Asked by: likethepopcorn
Please contact our tech support for further help with this issue. 800-338-0531 x1 or tech@parts-express.com.
Answered by: MattP
Date published: 2014-07-15

How to charge battery without removing from speaker box?

I want to make a portable speaker using a sealed lead acid battery and a tripath amp. I want to be able to charge the battery without having to open a latch to connect the alligator clips. Additionally, I don't want the wall socket cord hanging out the side of the boom box. How would I do this?
Asked by: SimonCL
It sounds like a nice little project, Simon. The Tripath amp generates very little heat so you will probably be ok even with the amp in a sealed box (I'm inferring from your brief question & description that you're installing the amp in the speaker box). You indicate that you are an amateur so I'm going to assume that you have some basic soldering skills. The Grip tools Charger will work well for your application and since it's an analog design and does not use a switching power supply it should not generate any noise that would get into the amplifier. I have not looked at the charger output with a scope but in the unlikely event that it does generate any noise that causes you grief let us know and I'll show you how to quiet things down.I have drawn a schematic diagram showing you how to connect charger, battery, amplifier and a very basic protection circuit. All of the parts are available from PE and I've indicated the PE part numbers on the diagram. You'll want to cut off the charger alligator clips so you can solder a plug onto the wires. The DC charger jack can be installed wherever it works best for you.The fuse and zener diode are there to protect the Tripath amplifier should a problem with the charger or battery cause the battery terminal voltage to exceed 15 Volts. If this should happen, the zener will conduct and blow the fast acting fuse disconnecting both the battery and charger. Be aware that if this happens and after you correct the cause of the problem you will most likely need to replace the zener diode along with the blown fuse. If you use a 5 Watt 15 Volt Zener the larger Zener will probably survive the short circuit current surge. PE does not offer a 5 Watt Zener but these are readily available from companies like Digikey.The circuit will work fine without the Zener diode and fuse but it's worth the extra effort to save the amp in the event of a fault condition.Let us know how things turn out.
Answered by: Frank18944
Date published: 2014-08-17

Is this charger safe for the following battery? 12v 4.5 ah? Or does the ah have to be at least 5? Thanks

Asked by: SPMA
You didn't mention the type of battery, such as sealed lead acid, gel cell, etc. No matter, this charger will work well for your 12.5 V battery. It doesn't matter what the amp hour rating is.If your battery is well discharged the green charge light will stay on for quite a while when you initially connect but will eventually go off. Then the red LED will stay on indicating the battery is fully charged and at the correct terminal voltage - ready for use. If you leave the charger connected all the time you will see the green charge LED go on and off periodically which indicates that the charger is maintaining a full charge automatically.There is no problem that I have found with leaving the charger connected all the time even during periods of connected equipment use. It will not damage the charger.It's a nice charger and very quiet from an RF point of view.
Answered by: Frank18944
Date published: 2014-08-03

power supply for lepai 20 20.

I want to build a portable stereo using the lepai 20 20 amp that uses a 9 amp hour 12v sealed lead acid battery for power. I want to know if this charger is safe to use on a sealed battery and if it will work as a power supply for the amp when the battery is on charge. THANKS.
Asked by: TWISTED MR.
Yes, you can safely use this charger for your 12 V sealed lead acid battery. It's an excellent float charger for this type of battery.No, you can not use this charger as a power supply for the Lepai 20-20 amplifier. Just leave the charger connected to the battery all the time. The amplifier will draw from both the charger and the battery when the battery is discharged however under this condition you will not get the best sound quality from the amp. The float charger does not have the current capability to drive the Lepai directly. This amplifier does require a good solid 2 to 4 Amp 12 to 13.8 V regulated supply to deliver its rated power output.
Answered by: Frank18944
Date published: 2014-08-03

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