18650?'s

[greenblast]

i make my all my nimh or nicad from quality cells or free.can you use the18650 cells to make packs.do they have to be balanced?can you use the pcb?my 3800 tenergy packs always read the same. is lipo different?

[Fluid]

I wish you proof read your post better, it is difficult to understand. So you make your packs for free?

The 3.7v/2600mAh cells have issues compared to LiPos - low capacity and a requirement to be run in parallel. Their cost is increasing too due to shortages of the materials used to make them. They should not be charged above 4.3 volts, almost impossible to insure with the cheap chargers usually used for them unless they are balanced prior to charging.

LiPos are different in many ways. While the round cells are cheap, they do not have the power potential of the Eneland LiPo cells, nor the capacity without excess weight. But if you get them for free, what the heck.



.

[greenblast]

fluid sorry for the confusing post. i didnt want to make a long run on .i have a friend who gets me recargeable batts from a recycle. i always have connectors and noodle wire on hand. i have alot of aa and c cell.he recently brought me12 18650 that is why i asked.

[greenblast]

stll need help.

i am looking for a 16 to 18v packs would 3.7 26a cells work ?anyone know of article to read?

[Bill-SOCAL]

The 18650 lithium cells are NOT lipos like we use. They are lithium-ion cells. Similar, but different. They are generally used for receiver packs, etc. Duralite and Fromeco both sell packs made for these uses. They are generally not rated for high discharge rates. Max discharge is rated at around 4 to 5 amps.

Here's a datasheet on one of the highest quality 18650 type cells made (Molicel)

http://www.molienergy.com/specs/ICR-18650J.pdf

[greenblast]

bill after reading discharge ratings for above cells would they be .2 c rating2600 mah at4 to5 amps . the more i get it the more i dont lol.sorry if i am way off the mark i am confused and dont want to burn up boat or house.thanks for any info.

[Bill-SOCAL]

No, discharge rate is between 4 and 5 amps, so it is around 2C for a 2400 mAh (2.4 amp-hour) cell, not , 0.2C.

Irrespective of the "C" rating, a 4 or 5 amp discharge rate is not sufficient for use for anything other than a receiver pack.

What they are saying is that you cannot discharge the packs at more than 4 amps load. If you do, bad things will happen to the cells!!

[ED66677]

these cells are commonly used in laptop batteries, I have 30 of them coming from old Toshiba's, the one I have are Samsung and the specs are pretty much the same as yours!

[Bill-SOCAL]

And they are fine to use for receiver power.

They are absolutely NOT suitable for use as power for a motor.

[greenblast]

bill thanks for the info i will not be using these cells.i dont need any more rec or bec cells. one again the knowledge from you guys has saved me again.

[hkusp45]

This just so to show....

There are no Dumb questions!!