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 11-09-11, 03:19 PM   #1
Niles H.
eternalvoyage
Thread Starter
 
Join Date: Feb 2007
Bikes:
Posts: 2,360
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Using 18650s to extend cell phone battery life -- easy hack?

The idea is to extend or greatly extend battery life, in order to have more time off the grid (on long tours for example). I realize that there are other approaches (solar and dynohubs, for example, which do not appeal to me at moment -- please let me know of other possibilities there might be).
Most cell and smart phones seem to run on 3.7 volt lithiums. Mine are 3.7 volts and 900mAh.
I already have charging cables with USB on one end and micro USB on the other end, which charge the phones off a laptop USB or other USB.
So one approach would be to find a 1x18650 case or holder fitted with USB (or simply with wires that could be fitted with USB).
Does anyone know where such cases can be found?
(Or any other ways of doing this, preferably with 18650s, but other ideas are welcomed too.)

Last edited by Niles H.; 11-09-11 at 03:25 PM.
Niles H. is offline   Reply With Quote
Old 11-09-11, 03:22 PM   #2
Ziemas
Senior Member
 
Ziemas's Avatar
 
Join Date: Nov 2004
Location: Riga, Latvia
Bikes:
Posts: 10,082
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Did you previously post here as 'Merton'?
Ziemas is offline   Reply With Quote
Old 11-09-11, 04:20 PM   #3
socalrider
Senior Member
 
socalrider's Avatar
 
Join Date: Mar 2004
Location: Upland, CA
Bikes: Litespeed Liege, Motorola Team Issue Eddy Mercxk, Surly Crosscheck Cyclocross bike, Fisher Supercaliber Mtn. Bike
Posts: 5,002
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
With all the lithium ion external packs available, this sounds a little extreme.. I have used the apc mobile power pack for extra capability on long rides

http://www.ebay.com/itm/APC-Battery-...item20be79030d

Duracell also sells one that is a little smaller but same concept..http://www.ebay.com/itm/Duracell-Rec...item2568d7c825

or go the cheap route and use AA cells: http://www.ebay.com/itm/380311445157...84.m1438.l2649
socalrider is offline   Reply With Quote
Old 11-09-11, 05:15 PM   #4
unterhausen
Randomhead
 
Join Date: Aug 2008
Location: Happy Valley, Pennsylvania
Bikes:
Posts: 14,859
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
the mintyboost uses AA batteries, I'm not sure what the maximum input voltage really is
unterhausen 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 11:02 AM.