Was bored today and looking thru treads here and realized I never posted a review of the Kobalt 80V 21" Self Propelled Mower that I bought in July 2020.
I did mention the purchase and discussed using it in post 3 of this thread:
I had been considering a battery powered mower for some time and my wife surprised me with a snapper xd for Christmas. When mowing season came around I noticed there was two problems with its design. The snapper xd has "load sensing" and adjusts the blade speed based on the thickness of your...
www.lawnmowerforum.com
... but never posted an actual review that I can find.
So, better late than never ...
Kobalt KMP 6080-06 80V 21" Self Propelled Lawnmower review:
It came with the 6Ah battery, Fast Charger, Rear Bagger, Mulch Plug, and Side Discharge Chute and I paid $473.50 before tax.
Having been used to a bail lever for self propel function on Lawn-Boy's my whole adult life as well as a Greenworks 40V MO40L02 that I bought in August of 2018 I did not know if I was going to like the thumb actuated SP lever on the Kobalt. Well, this ended up being a non-issue as my hands & brain adapted to this configuration without much effort.
The Greenworks MO40L02 is basically the same mower as the Kobalt just 40V instead of 80V and with a normal SP bail lever ... both are a 21" deck with a 20" cutting width. The GW will typically do my whole 15K sq-ft. lawn on (3) 4Ah (146Wh) batteries where this Kobalt can do it all on ONE 6Ah (432Wh) ... this all dependent on grass length / thickness and whether MULCHING or BAGGING.
40V: 3x146Wh = 438Wh
vs.
80V = 436Wh
Pretty mush a wash as far as power consumed doing the job.
Self Propel Speed Closely matches Kobalt Specs and is fast enough for my normal cutting pace:
MAX SPEED with fully charged 2.5Ah Battery (81.8V) 200FT in 42-43 Seconds = 3.17-3.25 MPH (per manual = 4.44 FPS = 3.03 MPH)
and
MAX SPEED with 1/2 discharged 6Ah Battery (72.6V) 200FT in 47-48 Seconds = 2.84-2.90 MPH
The 40V Greenworks self-propel speed is similar, so no benefit to 80V here.
Compare to the Lawn-Boy 10525 in 3rd Gear that I'm used to ...
(3260 RPM at no load): 200FT in 35-36 Seconds = 5.71-5.56 Ft-Sec = 3.83-3.78 MPH (Per manual = 3.8 MPH @ 3000 RPM)
Where the 80V excels is running the Greenworks HD Blade (2908902) that has more lift and offers a better cut. Problem is, it appears this blade may have been discontinued. I ran this blade two weeks in a row and bagged both times:
First week the grass was not too long in that it ran at the normal 2800 RPM and never kicked up to high speed however it did deplete the battery faster than the standard blade. I was running at cutting height # 3 (2-1/8").
Second week I again ran at cutting height # 3 and grass was really long and thick and mower kicked in & out of high speed mode.
I had also bought a generic 6Ah HYG brand 6Ah battery off of e-bay from Battery World ($147.00) and this was it's first test run.
I ran the 6Ah HYG Generic battery 1st and it lasted 27.6 minutes ... the Genuine Kobalt 6Ah went in 2nd and lasted 33.6 minutes. The HYG was fully recharged by the time the Kobalt decided it was done so the HYG went back in and had 2 bars left (1/2 charge) after the final 11 minutes.
Kobalt claims their 6Ah battery should take 180 minutes to charge, so it is hard to believe this HYG battery is a true 6Ah as I'd guess it was fully re-charged in about an hour. Based on the run time's I recorded, the HYG lasted 82% of the Kobalt which would be closer to 5Ah if conditions were identical which is really hard to say. Definitely similar grass length & thickness, but it does vary throughout my yard.
Filled 15 bags ... about 1.86 bushels / 20 lbs. each ... in about 1 hour 11 minutes total run time.
Third week I ran the GW-HD Blade at level 4 (2-5/8" cut) and Mulched this time ... really did a nice job. It jumped up to high speed a bunch of times where it was longer & thicker but not near as often as it did the prior week bagging at level 3 (2-1/8" cut).
Like week two, I started with the generic 6Ah battery and it lasted 37:40 minutes (4 minutes or 12% longer than last week) then ran the Kobalt 6Ah for the remaining 28 minutes and it had 3 of 4 bars remaining on the mower and 2 bars of 3 on the battery @ 77.3V.
YES ... this HD blade consumes batteries faster but cuts & bags better than the standard blade and it will be a bummer if GW had really discontinued it.
The generic 6Ah battery performance is definitely inferior to the OE Kobalt 6Ah battery but at a cost of $147.00 delivered it is a good value as it DOES outperform an OE Kobalt 2.5Ah which normally sells for $199.00 (6Ah is $351).
All in all, I am very pleased with the performance of this Kobalt 80V Mower as well as my 40V Greenworks version.
Doug