18650 Waterproof Battery Pack Case

[oyster]

Have got a waterproof battery pack for my front light. It works, yes, but I am not exactly thrilled by its life.

Thinking about getting a box and bunging some 18650s in it. But the more I look, the less I understand. Keep checking reviews and so many have a mix of awful and wonderful. That's just the box! Gets even more perplexing as to which 18650s to buy. Yes, I've seen the nkon.nl site - but even they have so very many.

So, does anyone have specific recommendations? It would be very nice to have some sort of high/medium/low battery level indicator, but not essential.

There is no hurry so sources such as AliExpress would be fine.

 

[soundwave]

https://www.ebay.co.uk/itm/6x18650-Battery-Storage-Case-Box-Holder-Waterproof-For-Bike-LED-Light-Outdoor/122906694664?hash=item1c9dcf5408:m:mUS5015JgLO-PusVW4-k8yw
https://www.ebay.co.uk/itm/Genuine-Panasonic-18650-3400mAh-Rechargeable-Battery-NCR18650B-Li-ion-Flat-Top/232578302243?hash=item3626bf4123:m:mMSDQJBuwtlNNBFkd24VXgA

 

[soundwave]

 

[spanos]

I have got three of these boxes.

My word of warning is the entry point of the wire into the pack is not very good. Just needs a dab of sugru or silicone sealant or something

I ruined one batch of 18650 by water ingress. Water ran down the cable into the box. The little blue o ring is pants

I also now ensure there is a drip loop or box ismounted differently

 

[oyster]

https://www.ebay.co.uk/itm/6x18650-Battery-Storage-Case-Box-Holder-Waterproof-For-Bike-LED-Light-Outdoor/122906694664?hash=item1c9dcf5408:m:mUS5015JgLO-PusVW4-k8yw
https://www.ebay.co.uk/itm/Genuine-Panasonic-18650-3400mAh-Rechargeable-Battery-NCR18650B-Li-ion-Flat-Top/232578302243?hash=item3626bf4123:m:mMSDQJBuwtlNNBFkd24VXgA

Apologies for taking so long to respond - have received the box and it looks fine. Now to order the batteries.

Thank you.

 

[oyster]

I have got three of these boxes.

My word of warning is the entry point of the wire into the pack is not very good. Just needs a dab of sugru or silicone sealant or something

I ruined one batch of 18650 by water ingress. Water ran down the cable into the box. The little blue o ring is pants

I also now ensure there is a drip loop or box ismounted differently

Appreciate the warning - will be very careful.

 

[soundwave]

also there is no short circuit protection so make sure the cells are in the right way up - + wise.

if one is the wrong way round the springs will melt tho done that a few times lol.

 

[oyster]

also there is no short circuit protection so make sure the cells are in the right way up - + wise.

if one is the wrong way round the springs will melt tho done that a few times lol.

I'm pretty careful about things like that! (Famous last words )

Do I have to fit the full complement of cells?

 

[soundwave]

Do I have to fit the full complement of cells?

yes or it wont be 8.4v