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PostPosted: Tue Dec 24, 2013 10:21 pm 
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Joined: Wed Oct 07, 2009 9:19 pm
Posts: 1513
Location: FL
I've had more than a few old Toughbooks in my hands and I'm often amazed at the quality Panasonic built into their batteries. Today I got ahold of a CF-M33, the first tiny Toughbook. It was born on Nov 1998, more than 15 years ago, and probably has the original battery. I charged the battery several hours till the light turned green. This came from an estate sale so likely this is the first time in years the battery has seen a charge. Booted it up and got the message about bad date & time, so the CMOS battery went dead. Check BIOS then booted to Windows 95 :nostalgia: Set brightness to max and watched the power meter. Over the last *2 hours* it has slowly and evenly run down to 10%, just got the low battery warning at 1:53 hours run time. I know Panasonic makes their own cells and often pleasantly surprised to get a well used battery that still hold a good charge, but .... 2 hours on a tiny battery made 15 years ago that probably has not been charged in many years .... simply amazing.

Got a few CF-M34 and CF-28 batteries that still perform well too. Gotta hand it to Panasonic, they sure know how to make a great performing battery (and a few other things too).

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ToughBooks: CF-74 73 53 52 51 31 30 29 28 27 25 19 18 08 07 C1 C2 F9 H1 M32 M33 M34 R2 S10 T8 T5 T4 T2 U1 W2 Y2 VDW07 PDRC ...
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PostPosted: Tue Dec 24, 2013 10:28 pm 
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Joined: Tue Dec 21, 2010 12:51 pm
Posts: 1894
Location: Northeast Louisiana
The battery in my "new" M34 Mk3 that I have still runs great too. Going by in install date it was the original install and I was on the first boot when I turned it on.

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CF-28 MK2,Mk3 / CF-29 Mk3 / CF-30 MK2 / CF-25 Mk1 ATI / CF-19 MK3/Mk3/Mk5 / CF-U1 Mk1,Mk2 / CF-M34 Mk7/Mk3 / CF-17 Mk1 / CF-07
Voodoo Envy M355 / M360 / M515 / M780 / U703 / Voodoo Hexx / Voodoo Idol / Voodoo Rage F1 / Voodoo Rage F1 / Voodoo Rage F1 "signed case" / Voodoo Omen
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PostPosted: Mon Jan 06, 2014 9:21 am 
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Joined: Wed Apr 18, 2012 12:28 pm
Posts: 52
Most of my CF-28 and CF-29 batteries are also good. 100% running 2-4 hours.

I also have 3 batteries for my CF-27s. They seem to work 120 minutes. but strangely, when i put them on my storage, and use them weeks/months later, they all drained to 3%. I guess, it might be the age of them. If I charge the Cf-27 batteries, they hold a charge for about 8 hours before using them.


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PostPosted: Mon Jan 06, 2014 10:04 am 
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Joined: Mon Mar 16, 2009 8:23 pm
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Yes sir!

Panasonic batteries > ALL others!!!!!!!!

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~Rob - Rugged Depot ~ Cell: (630)/300-8877~

~Fully rugged Toughbook user since April 18th 2005~
~New 3/16/18 - CF-54F0001KM Win10, Intel Core i5 6300U 2.4GHz, 240GB SSD, 12GB, Verizon 4G LTE, Intel 8260 WiFi a/b/g/n/ac, Bluetooth~
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PostPosted: Thu Jan 23, 2014 3:07 pm 
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Joined: Thu Mar 19, 2009 12:19 am
Posts: 232
This thread and the Hackaday link Toughbook posted inspired me to renew my efforts on my "dead" CF-28 battery. I ran the battery refresh utility and let it charge for a couple days. While in the BIOS, I also discovered it was set on high temperature environment, which prevents it from fully charging as well. Between all of that, I went from a 15 minute lifespan to 3+ hours on a WELL used battery.

<3 Panasonic


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