I have been browsing for the HP battery number and can see that some are selling this battery with higher capacity, I wonder if there is space for 18650, but HP has made the version I have with 16650.
Yes, there is a protection in the battery pack, not on each battery. With the above battery there is a small circuit at the bottom to protect the cell, you can see more here about that.
i have been to that page in the recent past on your web-site, very good info. i must say that in my previous lurking here i have read a lot of your posts/ reviews and they are all great and unbiased. as many others have said on here, thanks for all your time-consuming hard work to help everybody here make better informed decisions. thanks for letting me know about the 16650 batteries, as i almost bought the 17650, thinking they were better. your reviews of the sanyo UR16650 protected cells from intl-outdoor and keeppower, were great and i am trying to wrap my head around why the keeppower’s have a greater capacity. is this due to a better protection circuit?
There were rumors going around that Intl-Outdoor Store’s version of Sanyo 16650 protected batteries use B-grade rejects from some laptop manufacturer (perhaps Acer?)
I get mine from Intl. Outdoor. (Sanyo) These things slide into anything that will accept a CR123. I use them in all my Quarks and other lights that AW17670 are a hair too fat for. If you don’t like stacking cells, get some of these.
It seems from Finland http://www.akkula.fi
I have ordered some 16650’s, I have no connection with the seller,
but this is the first website i have seen selling keeppowers.
Thought i would share the (hopefully) good news.
HKJ: have you confirmed your pack contains 16650’s?
Anybody ever determine if the 16650’s can be had in the HP spare 633805-001 battery packs? I located new one (4200ma) that states 6 cells in it for $24 shipped. I see they have a 5200ma? battery pack also, but it may contain 18650’s for all i know???