Jumpstart from Dewalt battery

[2busy]

They had battery chargers that had a chainsaw engine and frame with an alternator

 

[swampratt]

Several decades ago, long before Algore invented the internet, I made a generator with an old vertical shaft mower engine and a car alternator. Frame of pieces of leftover lumber.

It worked for what I needed it to do.

Did you by chance fish Below lock 16 decades ago with the 2 flood lights?

Guy there all the time had his homemade generator going.

I have a 10HP engine and stainless frame old Honda power washer.
I would for sure spin 2 alternators or one 200 amper.

I have a lot of alternators laying around and a few starters.
Parts ya know.

 

[Shadowrider]

Here is a battery charger technique that I bet I am the only one here that has done it.

Dead battery on my car the year it happened was 1993.
No battery charger no other battery.
But I had a 1/2" Black and Decker drill and nuts and bolts and washers and some (many ) car parts laying around.

I fashioned a pulley with a shaft on it to chuck up in the drill and spin my alternator belt to charge my battery.
It worked and worked very well.

One thing I hear often is why don't they put alternators on these Electric Vehicles to charge them.

The strain it put on that 1/2" drill with 1 measly 12 volt battery was astonishing.
2 hands on the drill and you could almost smell it smoking the guts out of it.

Yep. I'm sure you've used a drill to prime an oil pump on a rebuilt engine. That's another huge parasitic draw. I'm kinda shocked that they haven't used electrical oil pumps yet. Beats Ford using a rubber belt in the sump these days on their newer Eco Boosts. We both know how that's going to work out.

They could still do the variable output if they just had to have it, could also dry sump them and even prelube before the starter kicks in with the right ECM programming. They are throwing a bunch of MPG away, you'd think they'd want that MPG with CAFE mandates the way they are.

 

[retrieverman]

The 12v battery was dead on my protein feeder, and I needed to get it opened. I remembered this thread and used my 40v Hercules impact battery to open it. Worked great. After I got it opened, I thought about a Herd360 solar panel/lithium battery pack I have for my cell cams and wondered if it would open and close the feeder, and it dang sure does. I’m probably going to buy one to put on the feeder for next year instead of buying a new battery.

 

[p238shooter]

Any electrical device needs electrons. All you have to do is look at the voltage (push) they need verses the amount they need (amperage = volume). Think about transferring electron stuff. Water is an example that is reverent. Valve on your ice maker has pressure, fills ice tray. Same pressure is out at your faucet, what if a fire hose connected? Going to squirt 50 ft? All pressure is the same in your house. Flush the toilet to reduce the volume available while wife is is the shower. Yep the voltage or "pressure" on the system drops.

9V battery rectangle in a bubble wrap from WM vs almost dead 9V battery on your car is different for example. All situations require "balancing the load" Like my gate. Yep drains battery, yep recharges in between.

 

[mtngunr]

If I had no other choice and worth risk of destroying a Dewalt battery rather than calling someone or mooching a jumpstart from a nearby person, as good cables are better because they are heavy and flow current with less resistance and less heat whereas Dewalt contacts are small and that sucker would be on the ground and not anywhere near my engine compartment if attempted, unless using it for a trickle charger...."but, but, the guy had no choice...except the phone he used to snap the staged photo with cables draped everywhere they shouldn't be", so, either fake or trickle charging a not very dead battery.