Jump to content

Should I but a second hand Ninebot which was unused for a year?


Jasonf20
 Share

Recommended Posts

Hi,

As the title says I found a guy selling a second hand Ninebot E+ and I am wondering if I should buy it since it sat unused for a year. I am concerned about impact to the battery life.

Should it be OK or would the battery be much worse then it should be?

 

Also, is there any way to verify the model really is an E+?

 

Thanks,

Jason

Link to comment
Share on other sites

26 minutes ago, Jasonf20 said:

Hi,

As the title says I found a guy selling a second hand Ninebot E+ and I am wondering if I should buy it since it sat unused for a year. I am concerned about impact to the battery life.

Should it be OK or would the battery be much worse then it should be?

From http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries this could mean something between 98% to 65% battery capacity left:

"

Temperature

40% charge

100% charge

Table 3: Estimated recoverable capacity when storing Li-ion for one year at various temperatures. Elevated temperature hastens permanent capacity loss. Not all Li-ion systems behave the same.

0°C 98% 94%
25°C 96% 80%
40°C 85% 65%
60°C 75% 60%
(after 3 months)

"

Worst case could be if he let the E+ with already empty batteries sit for a year - then they could be unusable by now.

26 minutes ago, Jasonf20 said:

Also, is there any way to verify the model really is an E+?

There were imho some small differences like screw holes etc which were different between E and E+. Maybe someone here remembers this in detail?

 

Link to comment
Share on other sites

I would ensure it powers on OK and that the protection circuit hasn't killed the battery for good if it was stored empty and self discharged below safe levels. If it powers up I'd ask where and how it was stored. The data @Chriull included shows how the temperature it was stored at make a big deal to battery degradation. I doubt the owner could tell you the charge it was stored at and has likely topped it up by now if the battery is functional.

For your safety I'd consider factoring a replacement battery pack in your purchase decision and replacing it anyway. Use it as a argument to get the price down. A bad battery can mean you eat the ground unexpectedly.

Link to comment
Share on other sites

7 hours ago, Jasonf20 said:

is there any way to verify the model really is an E+?

Look at the battery, an E+ has 320wh on the label.  If it says 220wh its a C+ battery.  The batteries could be switched but not likely.

Link to comment
Share on other sites

I think it is fine to buy a used Ninebot One.  You will definitely upgrade after you've learned and hit the limit on it.  I wouldn't worry about the battery much.  I only used my Ninebot One for a little over a month, then upgraded.

  • Upvote 1
Link to comment
Share on other sites

I think the batteries last for a while, a good example is the Airwheel which I bought 5 years ago, charged it tried to ride, gave up, left it in the garage, maybe brought it out for gatherings for a good laugh at people trying to ride it then back in the garage.  It still works fine and still holds a charge.  I wouldn't worry too much about the battery.  You can always replace it if needed.  I think the worst thing for a battery is to let it fun below the charging threshold.  But if it can still charge, that probably didn't happen.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

×
×
  • Create New...