HP OmniBook 600-800_battery_info free download

File name OB600NiMHBattDissect.PDF

OB600BattDissect Page 1 of 4 Omnibook 600 Battery Dissection I have a spare OB NiMh pack that's pretty well shot, so thought I'd look into the possibility of rebuilding it with new cells. It's the HPF1058A, rated 9.6 v and 1.7AH. All information presented here is for education only. I don't recommend anyone tampering with their battery packs, and take no responsibility whatsoever for any consequences of use of this information. Feel free to copy, share, or disseminate this info as desired, as long as this disclaimer is included. Some of the details here are similar to those that can be found in the article on rebuilding the OB300-530 battery pack on Chris Erickson's site. (or Alternative link) Although I haven't gotten to the point of actually replacing the cells, it appears that their size and shape is such that they could be replaced by the same cells mentioned in that article: Part # P016T-ND from www.digikey.com. Currently they are $4.93 each for the "T" part, with the metal tab attached. Note that this page deals with the NiMH battery version, NOT the newer LiIon as supplied with the OB800. The LiIon cells are not, to my knowledge, available as rebuild parts...and are, I believe, more dangerous to deal with in terms of possible explosion if not handled correctly. Contact: John [email protected] The first step was cutting the pack open. I used a diamond wheel on a flexible shaft, but a hot knife would probably work as well. I cut around the back surface, which faces out when the pack is in the computer. I felt this would interfere least with fitting back into the computer, and seemed to have the most open space underneath, as felt by squeezing on the sides before cutting. The OB300 article mentioned above described separating the plastic weld seam instead of cutting. I believe the seam here is stronger and more resistant than the OB300 pack (which I also have one of). However, after getting the thing open, it does appear that a determined and meticulous (and patient) person might be able to separate the seam. I didn't have that much patience. The top plastic was glued to protective foam which was also glued at some points to the battery pack. This was easily cut with a razor blade. Inside was a set of 8 NiMh cells, and a few components, labeled A, B, C, and D in the picture below. http://members.aol.com/jixix/OB600Batt/OB600BattDissect.html 9/29/00 OB600BattDissect Page 2 of 4 Lifting out the pack shows the metal strip connection from one end to the other. This is the side away from the four outside pack terminals. It's a very tight fit. Cutting the band and removing the insulation piece reveals the connections on this side. There's a black component labeled "Klixon" that had been folded over between two cells. There's also a flat white component seen at the left. These components are C and B in the labeled picture, respectively. Here is how the Klixon component, C, was laying originally. (The flat white component was hidden down agains

File name readme.txt

4/26/2000 By Christopher Erickson 11/27/2000 Updated Rebuilding Omnibook 600C, 600CT and 800CT LiIon battery packs. Because of the difficulty in finding replacement LiIon cells, rebuilding these battery packs is not presently possible. It is speculated that LiIon cells are not generally available to the public because they pose a fire hazard if improperly handled. This includes shorting cells, excessive heat from soldering and other dangers. NiMH and NiCd cells have different charge and discharge characteristics than LiIon and it is assumed that the battery management circuit inside the battery pack is fully incompatible with all but LiIon cells. One last note is that LiIon cells are about 3.7 volts each, not like Alkaline, NiCd and NiMH cells, which vary from 1.2 to 1.5 volts each. This means that it would take twelve NiMH cells to replace four LiIon cells. If someone were to find LiIon cells for sale somewhere, I would recommend ones with solder tabs. This would protect the cells from excessive soldering heat to a large degree. Common sense and soldering heat-shunt clamps (hemostats) would not be a bad idea either. As for good candidates for NiMH cells: www.Digikey.com, www.alliedelec.com As for LiIon cells: E-one Moli Energy, SONY, Eveready, ABSL, Envoy