Rollfast

I have a 2004 XP laptop with dead video and won't even output to a monitor, with the adapter plugged into it and I should get a priest and bury it. Otherwise, I am an Elmer Luddite.


I would build a hybrid with a 1957 Plymouth sedan and Mercedes 190D motor.

Clyde1820

For the past 8+ years, I've used the 18650 cells by AW, 2900-3400mAh. Exceptional performance.

Sometime in the next couple of years, it's likely I'll be refreshing the set of batteries. Might well go after the Panasonic NCR18650b 3400mAh cells. Half the price, very good performance in a large number of tests (reviews and independent tests, along with tests by individuals).

Never have liked the generic, no-name type "Made in China" cells. The ones I've tried haven't performed as well, and really haven't lasted very long before performance began to noticeably suffer.

YMMV.

2manybikes

If it's cold enough, yes. How cold? All batteries get weak when it's cold. The different types lose power differently. The cold slows or stops chemical reactions. When they get warm again most will be fine.

ItsJustMe

It almost certainly has 18650s in the pack. It's of an age to have LiIon and 18650s have been the standard way to build LiIon laptop packs since day one. Only laptops old enough to have NiMH packs (mid 90s and earlier I think) wouldn't have them. Or ones new enough to be < 20mm thick or so.

gios

It's common knowledge in the flashlight forum to avoid like the plauge any battery company with fire in it's name.


I use EVVA branded Panasonic 3500mAh 18650s.

seeker333

I recently updated my inventory of li-ion cells, discovering IMRbatteries of Houston, TX in the process. Their prices are low, you can purchase with Paypal, they offer low cost USPS shipping and their cells are authentic (not cheap counterfeits). For example, Panasonic flat top NCR18650B are $5.50 ea (or less), cheaper than any eBay or Amazon seller:

https://www.imrbatteries.com/panason...t-top-battery/

I also bought a new charger, the XTAR VC2. I chose this charger partly due to it's capability to measure total charge added to a cell, a feature not commonly found on li-ion cell chargers:

https://www.amazon.com/XTAR-Premium-.../dp/B00SV15NLQ

With the XTAR VC2 charger I was able to confirm capacity (and authenticity) on cells I bought from IMRbatteries. All cells (Panasonic, Sanyo, Imren) charged to nominal capacity. I also checked capacity of some of my old Chinese Xfire cells:

from Deal Extreme:
Trustfire - 2400mAh nominal; 1940, 1975 mAh actual (2 cells, practically new)
Trustfire - 2500mAh nominal; 1728mAh actual, used a good bit

from IMR batteries:
Pana 18650B 3400 nom; 3478, 3425, 3437, 3459 actual (4 cells purchased)
Sanyo 18650GA 3500 nom; 3615 actual
Imren 16340 700 nom; 717,747,721,767 actual

Shipping cost for the 9 cells from IMRbatteries.com via USPS was only $3.85 (UPS was about $18).

The Panasonics measured ~18.3mm x 65.05mm.

BTW, the zero at the end of the 18650, 16340 (cylindrical cell nomenclature) seems to be superfluous - every one ends in a zero. Tesla's Gigafactory now manufactures proprietary 2170 cells, with reportedly 70% more capacity over the Panasonic 1865(0) cells they used before in Tesla vehicles.

ExtremeSquared

Amazon is loaded with fake lithium cells, including Panasonics, so beware. The one reason I'll buy protected cells is that the protection circuit manufacturers have reliable sources of legit panasonic cells.

BBassett

New LG MJ1 18650 Battery (3500mAh) newest on the market as of 2017. They should OutLaw disposable batteries altogether and switch to these. It may make a large nose hair trimmer but better for the environment.

https://batterybro.com/blogs/18650-w...review-3500mah

UPDATE: $54.00 per 10 on eBay 12 jun 17