Hi there, Peter. I greatly appreciate your information. I am not yet competent with=20 this technology and had assumed that most (all?) prismatic-shaped Li=20 cells are in fact LiPo. From what you are saying, that is a=20 completely wrong assumption. I absolutely need the high values of short-term peak current ability=20 from the cell. The first project uses a dc-dc converter to power a=20 pair of beefy audio power amplifiers - the peak current from the cell=20 exceeds 4A for tens of milliseconds. I'd appreciate any suggestions of where to find pertinent on-line=20 information. Simple Google searches bring up far too many hits, with=20 most of what's shown near the top of the results pages being not=20 information that is useful to me. The problem is that I "Want It All". Small size, large capacity,=20 decent peak-current capability, long life. Inexpensive would be nice=20 but I do have some wiggle room there. For what it's worth, long life in this project means lifetime in=20 excess of 3 years with perhaps 30 - 40 charge-discharge cycles per=20 year. The next project may have more charge-discharge cycles per=20 year - up to 150 per year. dwayne At 03:14 AM 1/20/2016, Peter wrote: >Dwayne, the original cell is a LiIon cell, not LiPo, from aspect and specs= .. >LiPo will have a plastic shell, not a metal one. My experiences in sourcin= g >and replacing OEM camera type LiIon cells with LiPo show that a LiPo with >the same current capability as a LiIon is typically twice or more the volu= me >of the LiIon it replaces, and costs almost as much. Even if the capacity >matches, discharge current does not. Cameras draw 2-3A for short time span= s >on occasion, starting up, processing an image, actuating focus and zoom >motors, and charging the flash HV capacitor. The LiPo's typical same-size >specs do not allow this and the protection chip shuts output off. For high >current spec LiPo's try to look at RC modelling aimed ones. These have goo= d >current specs but have a short life and higher self discharge. --=20 Dwayne Reid Trinity Electronics Systems Ltd Edmonton, AB, CANADA 780-489-3199 voice 780-487-6397 fax 888-489-3199 Toll Free www.trinity-electronics.com Custom Electronics Design and Manufacturing --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .