[RE-wrenches] Lithium Ion tool batteries

[Ray]

I've had great luck with the Milwaukee M18; I almost never bring in my 
tool batteries anymore, unless its going to be below 0. Love the 
cordless shop vac.

I also use Ryobi, for my less used tools (ie.circular saw) and they have 
excellent performance for the money.  Not quite as temperature forgiving 
though.

As for Milwaukee chucks jamming up;  I only had that happen once after a 
bunch of hammer drilling in Haiti.  Scrounged all over the village for 
the special star keys to take apart the chuck, but it just needed to be 
cleaned.

Ray Walters
Remote Solar
303 505-8760

On 1/20/22 10:24 AM, Dana Orzel wrote:
> Really Happy with the Milwaukee M18 volt series. Various sized batteries available, & there have to be 150+ tools in the M18 series. I got into the Milwaukee 28 volt originally & what a nightmare; too heavy, replacement batteries were $$$ & life span on the battery was not good.
>
> I have been told the Milwaukee power tools have steel gears not plastic. The impacts are bomber solid.
>
> So far cold weather operation is good, no noticeable deficiencies. & I have charged them very cold so the battery charger BM is fairly smart/sensitive. I have noticed if really cold the charger says "broken Battery"
>
> I Loved the small cooler & reptile heater idea! Great idea!
>
>
>
> Dana Orzel                              Great Solar Works, Inc.
> C - 208.721.7003                       dana at solarwork.com
> Idaho Contractor - # 028765         Idaho PV # 028374
> NABCEP # 051112-136                       www.greatsolarworks.com
> "Responsible Technologies for Responsible People since 1988"
>  Please consider the environment before printing this email.
>
>
> -----Original Message-----
> From: RE-wrenches <re-wrenches-bounces at lists.re-wrenches.org> On Behalf Of drake.chamberlin at redwoodalliance.org
> Sent: Thursday, January 20, 2022 9:32 AM
> To: RE-wrenches <re-wrenches at lists.re-wrenches.org>
> Subject: Re: [RE-wrenches] Lithium Ion tool batteries
>
> What lithium battery powered tool brand that has the best performance in freezing weather? My 10 year old+ Makita tool set isn't nearly as powerful as some newer tools. Even with new batteries, the tools have sufficient power in cold weather.
>
> What is the best brand for cold weather operation?
>
> Thanks,
>
> Drake
>
> Drake Chamberlin
> Athens Electric LLC
> Ohio Electrical Contractor’s License 44810 CO Master Electrician’s License 4526 NABCEP Certified PV Installation Professional
>
> ---
>
>
> On 2022-01-19 11:58, Alex MeVay wrote:
>> Generally, storage or use at cold temperatures shouldn't be an issue,
>> as long as the battery can still deliver enough power to operate the
>> tool effectively.
>>
>> Charging though...at cold temperatures, ion mobility goes down.  If
>> the battery is charged too fast, the lithium ions can't make it into
>> the graphite anode fast enough and they start to plate out as metallic
>> lithium.  At best, this results in a permanent reduction in capacity.
>> Next worst from there, the lithium metal can create an internal soft
>> short, immediately or at a later point in time, resulting in high
>> self-discharge or a dead cell.  Worst case, it turns into a hard short
>> and a fire.
>>
>> In theory, the BMS or charger should prevent charging too fast or too
>> cold, but who knows if an edge-case like this is actually implemented
>> correctly on any particular battery system.    Be careful charging!
>>
>> Alex MeVay
>>
>> Genasun * Blue Sky Energy * http://sunforgellc.com
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