What Does the Ah (Amp hour) Mean on Cordless Tool Batteries? A Quick and Basic Explanation.

[@OutoftheWoodwork]

Check out my full drill/driver, hammer drill, impact driver how-to video! kzbin.info/www/bejne/qWbHqWmOm5eVabc Here's a great jig that turns your circular saw into a do-almost-everything tool and there's a free plan available: kzbin.info/www/bejne/n2Tdg31unpt6e6M

[@tappertrainman]

Thanks for clarifying that the larger Ah batteries are indeed just a little bit stronger. I've noticed this myself with certain higher-drain devices like my palm sander. It works much better off a 4Ah battery than a 2Ah. My impact/drill drivers work fine off the smaller capacity batteries.

[@teresaellis7062]

Thank you! I was trying to figure out what size of battery we needed for a bicycle generator project and now I know and I understand much more about Ah and batteries. 😊 I put off building a bicycle generator for years because all the different electronic parts were intimidating and confusing to me. Then my son was gifted a very nice motor to use to build such a project and I needed to dive in and figure it all out. A 7 Ah deep cycle battery should be plenty large enough. Phew, one more thing off the check list!

[@OutoftheWoodwork]

What a great project...glad the video helped a bit!

[@thescarlettbandit5542]

Four years on, still very informative. I just want to say, thank you, and boost your algorithms 😊🕊🇬🇧

[@kgt9535]

Very well explained, bro, but when talking about amp and voltage rules regarding circuitry (series, parallel or combination), instead of saying, the "amp hours" add up, or share (respectively) it's best to leave out the "...hours" part in that phrase. Now I do imagine that using "amp hours" in that part of your explanation might have been intentional to make it easier for some, but that could cause a bit of confusion since "ah" really doesn't fundamentally tie into circuit terminology. Battery terminology, yes, but not circuitry. Other than that, your presentation is absolutely perfect. Thank you for producing and sharing this 🙂 Now, please don't be offended by my critique. I mean it ONLY as an observing journeyman electrician ✊🙂

[@jmj267]

This was just a video I was looking for. Explained everything to me perfectly thank you very much for the video

[@OutoftheWoodwork]

You're welcome 🤛

[@MorrMedia1]

Good video, and grazes a broader topic I'm always trying to understand more about as a beginner woodworker: the electrical side of woodworking (extension cord gauge, amps/hp/watts/voltage, lithium ion battery care, etc.). I struggle to know what's a safe level of power to draw from a regular outlet and when my breakers will trip. Perhaps a video some day on the basics of the electrical side of woodworking for people who don't use a 220v setup? Seems like you have a good understanding of the topic. Thanks!

[@OutoftheWoodwork]

I would actually benefit from that, as well. I have a family member that is an electrical contractor and consulted in my shop setup, but I'm not knowledgable enough with the electrical side on my own. Maybe I will get with him one day to create a video like that...great idea!

[@chrisgeoss2543]

Ok, I figured that out and it makes sense. Explain now brushed vs. Brushless why and is it only new technology as to why we have less brushed tools, what was the purpose. Was one style more powerful or was it only due to the differences in technology....if that makes eense

[@ronsbeerreviewstools4361]

Thanks for posting a very informative video, cheers !

[@HappyHands.]

clearly the higher amperage batteries have more capacity but Is there a noticeable difference in tool motor speed or torque with regard a 4 amp battery vs a 5 amp battery? Does 1 Amp make a difference?

[@fredthehead4603]

Simplified analogy: Volts = size of gas tank. Amp hours = amount of fuel in the tank. Watt hours = Volts x Amp hours = hour far you can drive on a single tank.

[@NoSkills2660]

More like volts= type of fuel and amp hours like tank size. the consumer gonna say how long you gonna get with 5ah battery

[@andredalmolin]

Wrong

[@waldo2600]

Can i used a higher voltage battery on a lower voltage tool or will i fry it? If i have an 18v device can i run a 20v battery?

[@zmoney1212]

Here's a Dewalt fan boy 😂😂

[@TadpoleTrainer]

No. Volts is the power the tool can output. It’s more like engine displacement or torque than anything. Amp hours is just a capacity measurement. It is the capacity of the tank or as you put it the size of the tank. Voltage has nothing to do with the size of the battery capacity. A 20v battery will always be a 20v battery regardless of whether it’s charged or not. It is capable of powering a 20v device. With that said, you can get a more accurate idea of battery capacity multiplying the ah and the voltage. 4000 ah battery with 12 volts will give 36000 Wh but an 1800 ah battery with 20 volts will also give 35000 Wh. The 20 volt tool will eat through the power faster though.

[@honsville]

I notice the same with my dewalt tools: circular saw and drill. The tools get bogged down with a 3ah batter as opposed to a 5ah battery.

[@jayfeliciano2]

Hi i have an ingco drill with 2ah batteries, and i recently bought an ingco grass cutter which use the same battery, and after 4 to 5x of used the batteries dont charge as much as before. Before when i use the grass cutter it takes around 20mins before it drains but now only 5mins, it killed my batteries, do i need to use a higher ah for the grass cutter? Thank u so much

[@alexserret4816]

Wow guy thank you so much for putting this video up on what those letters mean going to send the video to my brother the knucklehead blaming the drill instead of the battery awesome video buddy thank you

[@OutoftheWoodwork]

Thanks Alex!

[@WabuhWabuh]

thx, for explaining. everyone else made it hard to understand

[@ThatOneOddGuy]

Is there any significant difference of battery life one charge between a bosch 1.5ah battery and 2.0ah battery

[@briggsb1]

So as long as the voltage is the same I can use any ah battery in my tool?

[@OutoftheWoodwork]

Yes, but depending on how much it draws it may not last very long. (ex, using a 1.5 ah battery in your cordless weed eater won't last long at all)

[@briggsb1]

@@OutoftheWoodwork I was actually thinking about upgrading from a 4ah to a 6ah. I just wanted to make sure I wouldn't do any damage. Thank you for responding.

[@TomisaLami]

Can I use two batteries with the same voltage but different amp hours in the same device? For example I leaf vacuum that came with a 40 V five amp hour battery. But I'm wondering if I can use my 40 vote for him our battery in the leaf vacuum. Same manufacturer same connections same voltage different amp hours.

[@OutoftheWoodwork]

Yes

[@fortitudevalance8424]

Bought a Metabo 5.2ah battery to work on a 18v cool box mainly ans for other Metabo tools that’s revelry acquired. The 5.2ah is not sufficient enough at all to sustain the cool box in the height of summer so will be getting a 10ah battery which costs a lot but should supply the box with enough juice for treble the time.

[@dukat03]

Very clear thank you!

[@Canoneosmiami]

How many times can 18v 2ah charge iPhone,iPad 6 ?

[@bigsled12]

Hello Was getting ready to buy the 20v dewalt 1/2 brushless cordless drill with either the 1.5 ah batteries or the 2.0 battery. Want to also buy the dewalt 20 volt impact wrench XR894 without/battery for taking lug nuts off 2 cars about 3 times a year. Will the batteries that come with the drill ( either the 1.5 or the 2.0 ) be sufficient for my application ? It seems like I wouldn't need the additional 12% of power in the test/ link you posted. The dewalt 5.0 battery lists at 160.00 but sells for about 120.00 I have a cordless impact 18 volt model dc821 someone gave me years ago but don't like it as it sometimes takes the lugs off and sometimes does not, either way I have to give it power for 20 sec. or so to get it to go. Its rated at 160 ft/lbs Regards

[@OutoftheWoodwork]

You can use it with the smaller batteries they'll just run out pretty quick. I'm not sure exactly how quick without testing it myself, but, if you don't want to purchase the 5 Ah batteries, you just keep charging them until you make it through!

[@georgemitchel23]

Thanks for the information 👍

[@marekholec8872]

Hi, you look like that you understand thing . Can you tell me what means shortcut TH ? Its on every battery. There is +- and TH. Thank you

[@agoogleuser9550]

TH is a Thermistor or a thermally sensitive resistor. It's properties change as temperature changes and can limit or increase current dependent on temperature. This is useful in case a battery begins to overheat, the resistance of the Thermistor can increase which will allow less current flow and therefore less heat, protecting the battery.

[@Jay-jr1fx]

short and sweet!

[@markdesouza7024]

Well a higher ah battery damage the tool?

[@markdesouza7024]

If I replace a 1.5ah battery with a 6 ah battery will it damage the tool?

[@ShanOakley]

thank you

[@socalrws]

Is there a method of measuring the AmpHr of a battery without taking apart to view series & parallel arrangements? Like some sort of digital device?

[@OutoftheWoodwork]

Not that I'm aware of, Ron. If it isn't listed on the battery I think you would have to tear it apart and look.

[@TheMeanbean21]

Thanks

[@robster69692000]

Thanks, I always wondered what that meant

[@atlred]

How come they just won't say how long the battery will last or giving an estimate time on how long a battery lasts because that's the answer that most people want

[@bubbaknowsstuff]

They are selling DeWalt 20 volt 8 AH replacement batteries that weigh 1.38 lbs. A DeWalt 20 volt 5 AH battery weighs 1.68 lbs and a DeWalt 20 volt 8 AH battery weighs2 lbs. So are these DeWalt 20 volt 8 AH replacement batteries a scam

[@maz7953]

If smartphones have 5000mah batteries, why are 5ah batteries so large and heavy

[@OutoftheWoodwork]

Your mobile's battery has a 5ah capacity with an output voltage of 3.7V. The tool's battery has an output voltage of 20V. So, the total energy stored in the cell battery is roughly 3.7 x 5 ah = 18.5Wh and the tool battery has 20 x 5 = 100 Wh. If you ran the tool on the cell phone battery it would be a little less than a 1ah battery.

[@Bart-Did-it]

Ah the Higher you go the longer she lasts 🔋

[@gregoryallen8098]

😊

[@kxttycatbat]

Hm

[@jumanjimedia6324]

Even more confused now 😂

[@bigdaddy111058]

Exc

[@felipea1844]

This video didn't satisfy me. All I know now is that 2.0 AH and 4.0 AH ... sucks! 2.0 AH should stand for 2 hrs. not, we don't know.

[@NoNo-uy2bq]

It would be impossible 2.0 AH to always stand for 2 hours though

[@digitalmediaproductions7976]

I know remember two abbreviated letters is really difficult....