[Dprglist] Ryobi battery packs

[Doug Paradis]

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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