[Dprglist] Ryobi battery packs
John Gauthier
zizumara at sbcglobal.net
Tue Jun 8 13:37:25 PDT 2021
Not on the mower. The battery pack label says 40VDC, 216 Wh, 6.0 Ah.
John G.
On 6/8/2021 3:06 PM, secretary at dprg.org wrote:
> John,
> Is there any type of name plate on the mower that gives voltage,
> amps, watts or similar information?
> - Doug P.
>
> On Tue, Jun 8, 2021 at 3:05 PM secretary at dprg.org
> <mailto:secretary at dprg.org> <secretary at dprg.org
> <mailto:secretary at dprg.org>> wrote:
>
> John,
> That run time changes things for sure. 6Ahr / 30 minutes =
> 12A running current or (12 x 40 = 480 watts) 2/3 hp. Thanks for
> the info.
> Regards,
> Doug P.
>
> On Tue, Jun 8, 2021 at 1:11 PM John Gauthier via DPRGlist
> <dprglist at lists.dprg.org <mailto:dprglist at lists.dprg.org>> wrote:
>
> I have a Ryobi RY401015 mower. It has not one, but two 6 Ahr
> batteries. Both batteries can be inserted into the mower, but
> only one is used at a time (selected by inserting a "start
> key" in one of two positions -- it's really just a shunt).
> The advertised 70 minute mowing time comes from depleting one
> battery, then the other. So one battery only gets you about
> 30 minutes mowing time under average conditions. Mowing time
> decreases with grass height and use of the self-propelled feature.
>
> John G.
>
> On 6/8/2021 9:59 AM, John Swindle via DPRGlist wrote:
>> 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> <mailto:paradug at gmail.com>
>> To: John Swindle <swindle at compuserve.com>
>> <mailto:swindle at compuserve.com>
>> Cc: dprglist at lists.dprg.org <mailto:dprglist at lists.dprg.org>
>> <dprglist at lists.dprg.org> <mailto:dprglist at lists.dprg.org>;
>> jjbrockm at gmail.com <mailto:jjbrockm at gmail.com>
>> <jjbrockm at gmail.com> <mailto: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 <mailto: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
>> <mailto:dprglist at lists.dprg.org>>
>> To: jesse brockmann <jjbrockm at gmail.com
>> <mailto:jjbrockm at gmail.com>>
>> Cc: DPRG <dprglist at lists.dprg.org
>> <mailto: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
>> <mailto: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
>> <mailto: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/
>> <https://hackaday.com/2021/06/07/ryobi-power-packs-as-ebike-batteries/>
>>
>>
>> Regards,
>> Doug P.
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