USB Charger Install
Author
Discussion

Beaver Dam

Original Poster:

49 posts

173 months

Friday 8th August 2025
quotequote all
Hi, want to install a basic Oxford USB charger which has o-rings going onto the battery terminals.

I’ve got an Optimate trickle charger which again has o-rings connectors on the battery terminals.

Am I okay to double stack o-rings or is having both connected to the battery terminals at the same time likely to cause problems? Dont want to fry the bikes electrics!



Cheers

Edited by Beaver Dam on Friday 8th August 22:43

johnsmith222

1,196 posts

103 months

Friday 8th August 2025
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You are perfectly fine to double-stack ring connectors on top of one another so don't worry. The only concern is that by connecting directly to the battery, you have the potential to drain it if you leave something plugged in (assuming your USB doesn't cut out when voltage drops).

GSA_fattie

2,370 posts

242 months

Saturday 9th August 2025
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cut the o ring to make a spade connector, then you only need to loosen the battery terminal bolts and slide the new connection in and then tighten

gareth_r

6,494 posts

258 months

Saturday 9th August 2025
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Just keep the main terminals from the bike's loom under the auxiliary connectors.

Beaver Dam

Original Poster:

49 posts

173 months

Saturday 9th August 2025
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Thanks y’all

Biker 1

8,332 posts

140 months

Saturday 9th August 2025
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As above, but I would definitely fit the correct fuse in line with the USB & also an isolator switch. Pointless having the thing drain even a small bit of power when the bike's laid up for the winter.

black-k1

12,632 posts

250 months

Saturday 9th August 2025
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I'd fit a relay, switched from an "ignition on" circuit and with an appropriate to the relay fuse from the battery. . I'd then correctly fuse the USB feed from the relay. Solves the current (pun intended) requirements, ensures no risk of battery drain and leaves things open to add more accessories later.

Dog Star

17,228 posts

189 months

Saturday 9th August 2025
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You might need longer screws for the battery terminals - they always seem to be just long enough for the main plus a small extra.

Soanesda01

1 posts

5 months

Saturday 9th August 2025
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If you have a few accessories connected to the battery I would consider something like a Healtech Thunderbox. It's a box of tricks that manages the accessories, so you connect accessories to this and then only the Healtech is connected to the battery. It prevents electrical overload, battery draining etc. Worth a look, I use it on my bike with no issues.

Onelastattempt

515 posts

68 months

Saturday 9th August 2025
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Soanesda01 said:
If you have a few accessories connected to the battery I would consider something like a Healtech Thunderbox. It's a box of tricks that manages the accessories, so you connect accessories to this and then only the Healtech is connected to the battery. It prevents electrical overload, battery draining etc. Worth a look, I use it on my bike with no issues.
Same for me on both my bikes, simple to fit and run accessories from . When you change your bike you can just remove it and put it on your new bike .