Thread: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
View Single Post
stlpaul is offline stlpaul
2012-05-10 , 18:12
Posts: 1,141 | Thanked: 781 times | Joined on Dec 2009 @ Magical Unicorn Land
#1280
Originally Posted by Estel View Post
Holy f*ck! I must check possibilities of putting it into custom N900 body (backcover only may be not enough, as You waste space for standard battery slot), 6000 mAh battery would be overkill.

Do you imagine runtime?

/Estel
I read that these new Panasonic 3100 mAh 18650 are what is used in the battery back for Tesla Roadster electric cars. 18650 size is what is used in laptop battery packs and many RC battery packs as well, so they are very cheap and easy to find. You can even extract them from old dead laptop batteries, often the cells are okay but one failed or the pack's circuitry is bad from being dropped or something...

18650 battery is cylindrical,18mm wide and 65mm long (up to 70mm with protection circuit attached). So, due to the shape, space utilization is not as efficient as the pouch (flat) style battery like mobile phones normally use. On the other hand, OMG the mAh.

Here is a great site doing tests of 18650 batteries and chargers:
http://lygte-info.dk/review/batterie...mary%20UK.html
 

The Following User Says Thank You to stlpaul For This Useful Post: