Charging more than 1 battery

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TimWang · #1 Post by **TimWang** » Wed Nov 16, 2005 8:37 pm

I've got a T43 and I was thinking of buying another battery and keep my current battery in my backpack to use as a spare. Is there any other "docking" station that charges batteries? Something that I can just keep under my desk and swap batteries. I've seen a cable like chaging system but don't really like the design.

mappler · #2 Post by **mappler** » Thu Nov 17, 2005 3:56 pm

Assuming you are using Lithium Ion batteries, you may find that you do not need to do this if you are just using it as a "spare". Lithium Ion batteries have a VERY low self-discharge rate when compared with NiCad and NiMH.

-Matt

christopher_wolf · #3 Post by **christopher_wolf** » Thu Nov 17, 2005 4:03 pm

Yup, I carry around a spare battery and it indeed has a very low discharge rate. It is recommended, however, that you store them at around 45% Charge, but I have not noticed any bad effects, especially when it comes to the Wear Level.

mrastudent · #4 Post by **mrastudent** » Thu Nov 17, 2005 7:17 pm

How about an Ultrabay battery? On my T42p it adds 2 hours and I don't have to do anything special to keep both batteries charged, just plug the laptop in.

christopher_wolf · #5 Post by **christopher_wolf** » Thu Nov 17, 2005 7:29 pm

The Ultrabay Battery is an Excellent Idea; except when you want to use a CD or DVD

It amounts to almost the same thing as carrying another battery around with you, but the Ultrabay charges with the Thinkpad's Main Battery at the same time.

TimWang · #6 Post by **TimWang** » Thu Nov 17, 2005 9:19 pm

Hmm... I've never actually considered buying a Ultrabay battery as I thought a 9 cell would be better. I should probably look into that.

no_man · #7 Post by **no_man** » Fri Nov 18, 2005 11:34 am

I use an IBM external battery charger, charges two at once. It has worked on all my IBM TP batteries from model T21 to my T41P. I bought it for around $15. from Ebay a couple years ago. Most of the time (like 90%) I run my Thinkpads on battery only.

dtakias · #8 Post by **dtakias** » Fri Nov 18, 2005 4:38 pm

no_man wrote:I use an IBM external battery charger, charges two at once. It has worked on all my IBM TP batteries from model T21 to my T41P. I bought it for around $15. from Ebay a couple years ago. Most of the time (like 90%) I run my Thinkpads on battery only.

is there one for t43 and where to get it?
cant seem to find anything on ebay

davidspalding · #9 Post by **davidspalding** » Fri Nov 18, 2005 7:20 pm

I bought an Ultrabay Slim battery with my T, it adds about 50% more life than the 6-cell. 9-cells are popular and robust ... but I didn't like the way they enlarge the footprint. An internal, second battery option was no option for me, eliminating many possible laptop purchases over the past few years.

Something I REALLY like is how the Power Manager software, well the hardware too, I guess, depletes the smaller battery first, then uses the main. Also, the Power Manager gauge explicitly shows performance, time/% remaining, activity (discharging, charging, no activity) yada yada yada. It's a very nice little system. If you can get an Ultrabay batt below retail price, it's a no-brainer, and you have one less thingie banging around in your bag.

stangri · #10 Post by **stangri** » Sun Nov 20, 2005 1:21 am

dtakias wrote:is there one for t43 and where to get it?
cant seem to find anything on ebay

Plenty of them, and many are T-series compatible: here on eBay

Charging more than 1 battery

Charging more than 1 battery

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