the problem is knowing what voltage it was using. With 4 3.2v 500mah batteries it could be 3.2v 2ah, 6.4v 1ah or 12.8v 500mah. The 12v option is unlikely in my opinion. It may be the electronics are 3.2v and the motor is 6.4v.

Wouldn't it be possible to add a different battery? Like the one I use for my R/C's?
And add a voltage control to it? Or is that too simplistic thinking? Mind you, my electric intelligence comes from you :)

>>38028 It a shame they went for such shit batteries because otherwise it's a pretty neat design.

here I was hoping it would have a particle accelerator infused with a proton stabilizer but no..

yep, €32 with cheapest shipping cost. Best to go back to manual labor. Thanks dude!

Interesting! 3.2V 500mah Lithium HFC Batteries, 2 pins on one end & soldered to PCB.

https://www.allbatteries.co.uk/lithium-iron-phosphate-battery-hfc1450-3-2v-500mah-picot-acl9063.html

From that we can see it would likely cost you probably 25-30 Euros, or more. Hard to say if it's worth it, but probably not :/

I made a small gallery of me prying it open. Thoughts?

https://imgur.com/a/wMsJZy5

I hope so.

Maybe you could take it apart an replace the battery?

Aaaaaand...<drum roll>




it's dead. At least the battery won't charge anymore but as long as I have power to the thing it will run but that kinda defeats the purpose. Oh well, back to manual labor.

I checked the specs and as I see it has a 12.8V 500ma battery so I think the amount of work it did on one charge is actually pretty good.

You'll just have to buy another one so you can pump both tyres fully from flat :D

The (re)charging adapter has an input of .45A and an output of 5V - 2A. I dunno if that means much to you.

I, for one, am just glad it works. Considering I don't have a power outlet in my basement flat, a battery pump was the only solution.

>>37681 Bummer. Hopefully after a good recharge it'll still be good for topping up tyres.

It's actually pretty hard to know the true capacity of a battery. Usually voltage is used to assess how much power is in it but with Lithium batteries that's pretty hard as the voltage remains pretty much the same from about 80% to 20% of capacity. Also unless you know how many amps went in to the battery when it was charged it's impossible to know how long the battery will last.

Try using a charger that shows how many (milli)amps go in when you charge it from flat so you can see how it's doing.

And if you're adventurous take it apart and see if you can replace the battery with a decent one (probably will require de-soldering and re-soldering).

And it's empty!
It pumped one tire full and one a bit more than half way before stopping. The battery charge went from 100% to 0% in an instant, so that display isn't really that handy. Still impressive, though.

>>37637 Nice! Looks like they didn't cheap out on the battery quality.

After 5 months the tires lost a bit of pressure, so I pumped them back to 8.5 bar. The battery looks to be still full.

>>37364 Sounds pretty good. Compressors are generally noisy, my 2 1/2HP 25L compressor in my workshop is so noisy I put it on a timer so it can't accidentally power up at night and piss off the neighbours :D

Well, so far I've pressurized 2 tires, and it still have a full charge left. It took the time to get to 8.5 bar but it did shut off the moment it hit that set limit. Bit noisy though.

This looks pretty sweet! Price is not bad too.
I really like that it can do high pressure road bike tyres. I still have an old Bianchi road bike and pumping those typres up to 120psi was hard work!

I didn't see where it says how much use you get from one charge, but you would likely only ever need one or two before you could charge it up again.