[ltp] Don't buy the IBM 8K8190 / 8K8191 Ultrabay Slim Battery.

[Bill Andrus]

Actually, this item is practical ONLY if you have two regular batteries and
want to continue processing without hibernation and wake-up while swapping
the mains.  I've found hibernation to be risky when travelling because the
wireless environment changes seem to always force a reboot when wake-up
fails.  By travelling with an extra 6- or 9-cell battery AND this Slim UB
cell, its very easy to pop the Multiburner, put in the Slim, swap the
mains, pull the Slim and reinsert the Multiburner.  YMMV.

Bill Andrus

Any sufficiently advanced technology is indistinguishable from magic. -
Arthur C. Clarke


linux-thinkpad-admin@linux-thinkpad.org wrote on 02/03/2006 09:28:43 AM:

> Executive summary: Don't buy this battery. Buy the 9-cell
> Li-Ion battery instead (that's the one that puts the bulge on
> the back of the Thinkpad), it's the same (or even more) bang
> for the buck, but keeps the Ultrabay free. Only buy the 8K8190
> (aka 8K8191) if you need to squeeze every minute of
> battery-powered independence out of a Thinkpad.
>
> For the record: I fell into an IBM marketing trap here.  The
> ultrabay slim batteries for the T series thinkpads *do* *not*
> double the capacity of the machine, despite the fact that
>
>   http://www5.pc.ibm.com/europe/products.
> nsf/$wwwPartNumLookup/_08K8190?OpenDocument
>
> talks about "doubling" the working time:
>
>   Install the battery in your ThinkPad's Ultrabay Slim or
>   Ultrabay Enhanced bay. Working in parallel with the standard
>   system battery, it can double your 'unplugged' time and
>   reduce the inconvenience of needing to stop work to switch to
>   a new battery.
>
> (The Ultrabay battery that I had in a previous R40 did indeed
> double the working time, but it does not fit into T series
> thinkpads.)
>
> Here, however:
>
>
http://www-307.ibm.com/pc/support/site.wss/document.do?lndocid=MIGR-46438
>
> the real technical specifications can be found, and it's
> suddenly just "up to 2 hours without recharge" battery life --
> hardly doubling the 3+ hours that I get with the original
> battery. Unfortunately, I hadn't seen that page before buying
> the battery.
>
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