Not exactly a car

[Chelsea maniac]

Hi I wonder if any of you brain boxes can help me, I want to add a usb charger to a mobility scooter straight to the battery

Will I need a relay even though it as got an on/off switch

will it flatten the battery

and is an electric mobility scooter dc motor grounded if so If I use a relay can I just ground to frame

Thank you I’m thick when it comes to stuff like this

 

Share the knowledge

Attachments:

1. 

   Screenshot-2021-10-16-235055.png
   

You need to login in order to vote

[UK Sentinel]

Nearly a car ;-) you can get via a well know auction site a usb adaptor that actual plugs into the charging point on the mobility scooter, so no need for relays / grounding etc.

(need to check with supplier this will fit with the mobility scooter you are looking at)

https://www.ebay.co.uk/itm/332873999101

Share the knowledge

Attachments:

1. 

   scooter-usb.jpg
   

In a completely sane world, madness is the only freedom (J.G.Ballard).

You need to login in order to vote

[UK Sentinel]

Batteries and how long they last:

In simple terms:

The power and longevity of a battery is noted by its Amp Hour (Ah) rating. Basically, this denotes how long a battery will last if it isn’t recharged. For example if a battery is rated as, say 8Ah, it will be able to provide 4 amps for 2 hours. If a battery is rated as 100Ah, it will produce 100 Amps for 1 hour.

No idea what battery a mobility scooter uses, but as a comparison, On average, a car battery can maintain about 5amps for ten hours. That makes such a battery a 50amp hour battery. That is equal to around 600-watt hours

As an example, an iPhone 12 uses a 2000 (ish) mAh battery  –  1000 mAh is equal to a 1 Amp Hour (AH) rating so the mobility scooter battery will not go flat by the phone charging as the phone will use 2 amps of the 50 from the mobility scooter battery per charge (ish)

Hope that helps

Ref: https://haynes.com/en-gb/tips-tutorials/amp-hours-explained-what-drains-car-battery#:~:text=The%20power%20and%20longevity%20of,100%20Amps%20for%201%20hour.

 

Share the knowledge

In a completely sane world, madness is the only freedom (J.G.Ballard).

You need to login in order to vote

[Chelsea maniac]

Cheers that answers my question, I was looking at those things on the well know auction site, but you have to keep taking them out and I would lose it, I have 2 12v 75 ah batteries so should not have any problems so will wire it direct to batteries that way if I ever break down.

Broke my back so need my scooter to get around as walking is a bit difficult and forever forgetting to charge my phone may also put it in the back box and add 5v usb led light, so I can see what I’m doing when I am in the garage when I get home from the pub after dark and a bit tipsy

Share the knowledge

You need to login in order to vote

[UK Sentinel]

2 x 12v 75 ah batteries will last forever – so longer down the pub or at Stamford Bridge

Share the knowledge

In a completely sane world, madness is the only freedom (J.G.Ballard).

You need to login in order to vote

[Chelsea maniac]

I wish I could get to the Bridge, not been for years used to go every home game but unfortunately cant do it now. Even with big 75 a/h batteries it wont make it to London so stuck with going to the pub or finding a dodgy link

Share the knowledge

Liked by:

You need to login in order to vote

[Author]

Posts