Saturday, May 27, 2017

DeWalt NiCd Tool Battery Teardowns

It's the last week in May - so the last week of tool pack teardowns for a while.

This week, I've got a huge pile of older DeWalt 18V NiCd batteries (and a lone 14.4V battery) that need to come apart so I can remove them from my office and get some space back.

I've got a 14.4V XR pack, a stock 18V pack, an 18V XR pack, an 18V XR2 pack, and an 18V XR+ NiCd pack.  They look pretty similar on the outside, but the similar form factors conceal some (very) minor interior differences!


Are you interested?  Well, if you've seen one NiCd pack, you've seen most of them - this is not one of my more exciting posts.  But, read on if you're curious.

Saturday, May 20, 2017

Ryobi One+ Lithium & NiCd Tool Battery Teardown

It's still May, and I'm still doing tool pack teardowns to get through the seemingly endless boxes of tool batteries in my office.  I'm a bit fuzzy on where they all came from, though I do faintly recall picking up a box of dead ones at some point in the past.

This week, I have a pair of Ryobi One+ batteries - one lithium, one NiCd.  This represents the "old generation" and "new generation" of a generation of batteries - they both run in the 18V tools, but one is the old style NiCd, and one is a new style lithium (though, as you'll see, early lithium).


Join me as I rip into another two packs!


Saturday, May 13, 2017

DeWalt 20V Max 1.3Ah and 18V Nano Phosphate Teardown

Another week in May, another pair of tool packs in my series of tool pack teardowns!

This week, I'm back to DeWalt with a 20V Max 1.3Ah, and an older 18V "Nano Phosphate" pack - which has the weirdest cell layout I've ever seen.  The date code says 2007 - so this is another example of an early tool pack in the "Working out the details" phase of lithium tool packs.


Join me as I rip into another two DeWalt lithium battery packs!

Saturday, May 6, 2017

Rigid 18V Lithium Ion Tool Battery Teardowns

This week, I'm continuing my tool pack teardowns with a pair of Rigid 18V Lithium Ion packs out of Canada - and, in one of them, 18650s produced in Canada!


These are older lithium packs (one is very definitely the oldest I've seen), the capacity numbers aren't that great, but they're interesting samples, good fun to pull apart, and have some surprises inside!

Read on to see what I've found!

Saturday, April 29, 2017

Can you fry an egg with a DeWalt 20V Max 6.0Ah Battery?

Last week, I reviewed a brand new DeWalt 20V Max 6.0Ah battery - but I did leave one important question unanswered - a question that is obviously on everyone's mind.

Can you fry an egg with this battery?


This is a question that, as far as I can tell, simply hasn't been answered.  I've found plenty of urban legends about cooking eggs with cell phones (not remotely plausible), and there's a YouTube video that seems to imply an egg being cooked with a battery of some sort or another - but a tool battery?  A DeWalt tool battery?  I can't find a thing!

Which, of course, means that I need to try!  Read on to see what happens.

Saturday, April 22, 2017

DeWalt 20V Max 6.0Ah Pack Teardown & Analysis

It's been a little while since I've had a shiny new tool battery to tear down!  This one showed up in the mail for some analysis and evaluation - so analyze and evaluate it I shall!

As of the time of posting, you can get 2 for $150 (shipped) on eBay - which almost certainly beats your local hardware store by a lot.  But, only if they're good.


This is a notable pack in that it's (supposedly) using 20700 format cells - the first non-18650 based tool pack I've had the opportunity to rip into.

What's inside?  Is it any good?  Read on to find out!

Saturday, April 15, 2017

Doing the Math: 2016 California Autonomous Vehicle Disengagement Reports

Self driving cars.  The imminent future of on-demand and super cheap transportation - or still a long development slog ahead, depending on who you listen to.  Earlier this year, California released the 2016 Autonomous Vehicle Disengagement Reports - which are reports of times that the human driver had to take over from the computers (either because the computers handed off control, or because the human wasn't comfortable with what the computer was doing).


When the reports came out, quite a few sites covered them - at the year granularity.  They just did some quick aggregation of the numbers for a whole year, perhaps made a graph, and (as is common in the media today) published a quick article about it.

I haven't seen anyone delving deeply into the data by using the month-by-month numbers - which are provided.  So, I did.  And some very interesting trends showed up for a few companies!

Interested in how everyone did in the month-by-month data?  Read on!