Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Electronics, Lighting, & Gadgets HRM, GPS, MP3, HID. Whether it's got an acronym or not, here's where you'll find discussions on all sorts of tools, toys and gadgets.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 09-21-13, 12:28 PM   #1
no1mad
Thunder Whisperer
Thread Starter
 
no1mad's Avatar
 
Join Date: Apr 2008
Location: NE OK
Bikes: '06 Kona Smoke
Posts: 8,655
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 41 Post(s)
How to determine waterproofness of a battery pack?

As some know, I recently acquired a new light from DX (product link for reference).

While I have no intention of riding around in a monsoon, there will be times that I will most likely be caught out in the rain* and would hate to fry this thing because the battery pack or connecting plug got wetter than they should...

*Rain around here is basically any type of water falling from the sky, from a light drizzle to coming in sideways in sheets w/hail and the accompanying acoustical light show.
__________________
Community guidelines
no1mad is offline   Reply With Quote
Old 09-21-13, 04:07 PM   #2
Looigi
Senior Member
 
Looigi's Avatar
 
Join Date: Dec 2010
Bikes:
Posts: 8,942
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Is it specified as water/weather resistant? Many recognized brand name bike lights are specified as being water resistant and if they fail it's rectified under warranty. Barring that, you have to inspect it as best you can. Does it looked sealed? Are there gaskets or sealant everywhere there would need to be? Are there openings that look like they'd let water into the works?
Looigi is offline   Reply With Quote
Old 09-21-13, 04:11 PM   #3
1nterceptor
LET'S ROLL
 
1nterceptor's Avatar
 
Join Date: Nov 2009
Location: NEW YORK, NY - USA
Bikes: 2014 BMC Gran Fondo, 2013 Brompton S6L-X
Posts: 3,803
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 13 Post(s)
My light has a similar connector and battery pack.
As a precaution I wrapped the battery in ziplocks,
then placed them back in the holster. Have used it
in a few downpours; no problems so far.

http://www.youtube.com/watch?v=MLeZhBw3cjI
1nterceptor is offline   Reply With Quote
Old 09-21-13, 09:43 PM   #4
dougmc
Senior Member
 
dougmc's Avatar
 
Join Date: Jul 2008
Location: Austin, TX
Bikes: Giant OCR2, Bridgestone RB-T, Bike-E, Vision R-40, Novara Safari
Posts: 3,029
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by no1mad View Post
As some know, I recently acquired a new light from DX (product link for reference).
The battery pack on that looks just like the other packs I've gotten from DX and eBay and such -- cheap.

Assuming it's just like the ones I got, it's not water resistant at all -- riding in moderate rain could get rain in the battery pack and mess up the protective circuit and cause rust where it touches steel.

That said, it's really easy to make almost completely waterproof. Remove the battery from the fabric case, put a zip lock back around it, and then tighten it around the battery and let the cord come out of the hole, then wrap the excess bag around the cord and then tape it all down. Now it's almost waterproof, able to survive just about everything up to a short complete immersion (if you made it all tight and taped it off well.)

Oh, and don't worry too much about water getting into the plug. It can cause rust, but it won't short anything out or anything like that.

Last edited by dougmc; 09-21-13 at 10:04 PM.
dougmc is offline   Reply With Quote
Old 09-24-13, 12:05 PM   #5
Booger1
Senior Member
 
Join Date: Sep 2007
Location: Gaseous Cloud around Uranus
Bikes:
Posts: 3,688
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Low voltage batteries and flashlights will work when wet....they work underwater.

If you sink your car in a lake with the electric windows up,they will roll down if you push the button.

If you want to waterproof it,spray,brush or dip it in Plasti-dip.

Use dielectric grease on the plugs to prevent rust/corrosion.

Last edited by Booger1; 09-24-13 at 12:08 PM.
Booger1 is offline   Reply With Quote
Old 09-24-13, 01:29 PM   #6
dougmc
Senior Member
 
dougmc's Avatar
 
Join Date: Jul 2008
Location: Austin, TX
Bikes: Giant OCR2, Bridgestone RB-T, Bike-E, Vision R-40, Novara Safari
Posts: 3,029
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Booger1 View Post
Low voltage batteries and flashlights will work when wet....they work underwater.
Well, except that most of our LED lights have driver circuits, and the lithium ion batteries have circuits that prevent them from over or undercharging.

How these things react to water is much less certain than how an old incandescent D-cell flashlight will.

As for what car windows will do, that's probably mandated by the safety rules -- so they limit the electronics required to control them and stick to tried and true (and still work when wet) switches and relays. Bike lights are not so regulated.
dougmc is offline   Reply With Quote
Old 09-24-13, 01:41 PM   #7
rumrunn6
Senior Member
 
rumrunn6's Avatar
 
Join Date: Jul 2008
Location: 25 miles northwest of Boston
Bikes: Bottecchia Sprint
Posts: 14,005
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 56 Post(s)
I put mine in an extra water bottle and covered it with 2 sandwich bags and 3 rubber bands. it was wrapped in thin bubble wrap to offer winter thermal protection. this time of year it rides in my rear rack trunk
Attached Images
File Type: jpg battery in bottle small.jpg (74.0 KB, 6 views)
rumrunn6 is offline   Reply With Quote
Old 09-25-13, 11:27 PM   #8
niuoka
Senior Member
 
Join Date: Aug 2013
Location: lebanon oregon
Bikes: trex 7500, old diamondback, older diamondback old frankenbike
Posts: 196
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I like the idea posted above about putting it in plastic dip,
however, for me , for now, the cords are long enough that I wrapped the battery pack with electrical tape, then put it in the little pouch it came with then have the battery pack in a zip lock bag and then in one of the pockets of my panniers, with the zipper zipped tight against the cord,
No issues yet....and it gets very wet where I live, Oregon
Prob over kill, but I don't want to find out one night in the rain
niuoka is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 06:43 AM.