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    EGO 56V 4Ah lawn tool Lithium Ion battery

    I picked up some used 2.0a batteries on ebay to play with. One seems to be bricked so I didn't mind tearing into it deeper. As M52 already mentioned, the protection must be built into the tools. The main terminals are wired directly off the cells. Also, confirming this 2.0 battery is 14 cells in...
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    Greenworks 40v G-MAX disassembled- 11C rating?

    Cool!
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    Greenworks 40v G-MAX disassembled- 11C rating?

    Maybe you missed it in the original post, I did actually disassemble my first gmax battery and identified the cells. Theres a photo half way down the fisrt page (although you probably can't see the cell markings.) Can't say for sure if all of them use these cells, but mine from mid 2013 were...
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    Greenworks 40v G-MAX disassembled- 11C rating?

    This is just how the gmax is designed. Others have noted that the main terminals ar always on as well. How do you activate your old greenworks 40v? Just jumper pins 4 & 2?
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    Greenworks 40v G-MAX disassembled- 11C rating?

    Not sure what you mean by adaptor... I'm just connecting to the main +/- terminals directly with greenworks insert blocks. Full voltage is always available to the main terminals unlike the older version which shuts down when idle. Was the LVC you were seeing from the controller? I have run down...
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    Greenworks 40v G-MAX disassembled- 11C rating?

    Warning to anyone using these batteries... They have no internal LVC whatsoever. I accidentally left them connected to the bike with controller on for almost a month. They drained to 1.5v total pack voltage and would not take a charge. Thought they were bricked, but was able to nurse them back...
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    Ryobi battery Build - Am i ready to test?(update: success)

    Awesome setup! Have you confirmed that both parallel banks are drawing down equally? A problem I ran into with P108's was that when they are paralleled, one would be shut down by the bms. (When sitting idle, the main terminals do not output 18v on these batteries.) I ended up using the "guages"...
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    Ryobi 18v 4ah, INR18650-20Q

    Yes, wait 2 minutes before disconnecting. If its still good, maybe the s/p configuration will work without issues? Would still recommend riding for awhile and make sure its drawing them down evenly. Good luck!
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    EZip Trailz LS - 2013

    Local Walmart has this on sale for $350. Looks like a good wife bike. How is the torque on this thing for hill climbing? (stock) The only way I could justify it is if she could climb a big hill by our house with "normal" pedal input. That keeps her from riding her non-ebike. My only point of...
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    Ryobi 18v 4ah, INR18650-20Q

    Exactly, the gauges would reset to the other battery. I guess what I said previously about unplugging them all and checking voltage wasn't accurate. You would need to check whichever battery in each parallel set was plugged in last. If I remember right, you can get them both active with the...
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    Ryobi 18v 4ah, INR18650-20Q

    Try first disconnecting whichever battery was put in the gauge second. If I remember right, that was always the inactive one.
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    Ryobi 18v 4ah, INR18650-20Q

    Run it like that and see if the batteries all drain. Maybe since you're running series as well this is different? The problem I had was if I pulled the live battery first, the second battery would be activated by the gauge as the first one was removed. So hard to tell unless you happen to pull...
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    Ryobi 18v 4ah, INR18650-20Q

    Interesting find. Mine does the same. Only problem is if you hold down the button, it still shuts off a few seconds later as if you just pressed/released the button.
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    Ryobi 18v 4ah, INR18650-20Q

    Also... I did find one partial work around. Unplug/replug each battery separately so that both batteries are at 18v. Then keep a load on it. They both seemed to stay on as long as the bike was pulling amps. But as soon as you stop for more than a minute one of the batteries would drop. Another...
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    Ryobi 18v 4ah, INR18650-20Q

    There was no way to know looking at the gauges, because they were paralleled and both would light up even if only one battery was active. You could tell which one shut off by removing both gauges and immediately measuring battery voltage. The active one would stay at 18v for 1 minute. The "off"...
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    Ryobi 18v 4ah, INR18650-20Q

    1- Yeah, I don't know what to call it, but there is some sort of communication that happens between the battery and the gauge that keeps it active beyond 1 minute without a load. Tools don't need this, a load will activate the battery (but only one, if two are in parallel.) 2- The problem was...
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    Greenworks 40v G-MAX disassembled- 11C rating?

    Nice find! That's correct. The chargers aren't even wired to the main +. It charges off one of the middle terminals, and the other is temperature I believe.
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    Q100 at 50-60v

    Finally got around to replacing all the 50v caps with 63v. The speeds I posted earlier are legit. On a full charge it averaged 25.0mph in 1 direction and 28.5 in the other.
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    Cute Q100 / Q100C Programmable Controller

    Thanks for the feedback. I have gone full throttle like that, but only a few times. I ordered some replacement 63v caps for both the smaller 47uf and also the main 1000uf. Would have done 100v but the 1000uf was too big. Might only install the main one depending on how hard it is to get at the...
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    Cute Q100 / Q100C Programmable Controller

    So I'm not sure which one is considered the main power cap... the biggest one is coming right off the main +/- inputs (50v 1000uF, see pic) so it's definitely seeing 62v at full charge. Then there's 1 63v medium sized cap in the middle of the board, 5 other smaller 50v caps, one 26v and 1 16v.
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    Cute Q100 / Q100C Programmable Controller

    So you left the rest of the 50v caps in place? Do the others not see full voltage or just not as concerned about them as the main power cap? I have a KU65 which I assumed had 63v caps but found all but one are 50v. Been running 62v max without issues but am worried about it. The main cap is easy...
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    Q100 at 50-60v

    2 parallel Greenworks in series with 2 parallel Ryobis. Greenworks is 10s2p 4ah (37v nominal) and Ryobi is 5s2p 4ah (18v nominal.)
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    Q100 at 50-60v

    Now I'm concerned about this. Looked at the big 50v cap closer and it's coming right off the main +/- inputs, so it's definitely seeing 62v at full charge. Then there's the 63v medium sized cap, 5 other smaller 50v caps, one 26v and 1 16v (these 2 are probably fine, only seeing reduced...
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    Q100 at 50-60v

    Haha! Nice!
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    Q100 at 50-60v

    Just went for a cruise and verified my speedo is accurate (to my phone gps anyways.) I think a factor that I was underestimating though is wind. You never notice it until its blasting you in the face. Will need to test again on a calm day, but best I can tell from going in both directions on the...
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