[Dprglist] Ryobi battery packs

[John Swindle]

One mower is too dirty to read anything on it such as faceplate. One is still in its box which says "13 amps". But I don't see a wattage or VA number. So, I don't know if its 13 reactive amps that don't draw power, or 13 amps like a space heater. Not going to tear into the box just yet.
I've never used a battery-powered mower.

A Kill-a-Watt would be nice to see what's really happening, but I've noticed that watt meters from different vendors display radically different results depending on the load's reactance. Even Kill-a-watt can be fooled to report no power being drawn.
Best to you,John Swindle

-----Original Message-----
From: Doug Paradis <paradug at gmail.com>
To: John Swindle <swindle at compuserve.com>
Cc: dprglist at lists.dprg.org <dprglist at lists.dprg.org>; jjbrockm at gmail.com <jjbrockm at gmail.com>
Sent: Tue, Jun 8, 2021 9:01 am
Subject: Re: [Dprglist] Ryobi battery packs

John,     Good to hear from you as always. My calculation was based on internet reviews of run time. I may be misunderstanding the battery's specs. They call it a 40V, 6A battery. I made the assumption that what they meant was 6 Ahr. If they mean the output is 40V at 6A that would be 240W (~1/3 hp), and a capacity of 9Ahr for 1.5 hours of life versus the 160W (~0.21 hp) I initially estimated. However they sell the batteries in terms of 40V/2A, 40V/4A, 40V/6A, so I think my original assumption that the "A" value is really Ahr is likely correct. Have you ever owned a battery power mower? I know the Ryobi mowers use brushless motors and very thin light weight cutting blades. Would you share the wattage or volt/amp values from your mower's faceplate? It would be interesting to know what values to expect. 
    You have made me curious, next time I'm in Home Depot, might look over the electric mowers' faceplates. It is frustrating how the adverts and mower websites never really tell you anything.
Regards,Doug P.  
On Tue, Jun 8, 2021 at 7:42 AM John Swindle via DPRGlist <dprglist at lists.dprg.org> wrote:

Is 160w enough to mow? I think corded electric mowers draw more than a kilowatt. Never measured it, but labels say big amps. (I've only ever owned electric mowers for 40 years. Don't last more than about 100 running hours, so I've had several.)


-----Original Message-----
From: Doug Paradis via DPRGlist <dprglist at lists.dprg.org>
To: jesse brockmann <jjbrockm at gmail.com>
Cc: DPRG <dprglist at lists.dprg.org>
Sent: Tue, Jun 8, 2021 7:29 am
Subject: Re: [Dprglist] Ryobi battery packs

Jesse,    Looking at reviews of the battery it seems a fresh 40 volt 6Ahr battery put in an electric lawn mower lasts about 1.5 hrs. This means that the draw for its intended use is 4A (i.e., 160W).. 
On Mon, Jun 7, 2021 at 12:40 PM jesse brockmann via DPRGlist <dprglist at lists.dprg.org> wrote:

What I wonder is what the current ratings of a Ryobi pack like this is? Can I draw 10c?   😀😀
On Mon, Jun 7, 2021, 12:33 PM Doug Paradis via DPRGlist <dprglist at lists.dprg.org> wrote:

Murray and Harold,           Thought you might enjoy this.https://hackaday.com/2021/06/07/ryobi-power-packs-as-ebike-batteries/ 

Regards,Doug P._______________________________________________
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