Where do buy this power plug?

[uuhoever]

I bought a used battery pack here and figured out that I need this plug to charge it. Anyone could please let me know what they are called/where to buy so I can search for it?

I just want to buy the connector plug so I can solder/adapt it to my charger.

 

[john61ct]

The pin thickness and interior diameter are also relevant.

You can buy a "universal" connector set, for 12V car adapters is very common and cheap, 24 or 28 or so different plugs

look for the ones that have good labeling of the different types.

The 5521 type (5.5x2.1mm) is good to use as your "standard" Rosetta stone if you make up mix and match pigtails.

But all these are really just for low amps, best to standardize on Anderson connectors for higher currents

 

[uuhoever]

Thanks for pointing me in the right direction. I found a DC 8mm to Anderson cable on amazon in case anyone might need it in the future: iGreely Connectors to DC 8mm Adapter 14-16 AWG Cable for Solar Panel Goal Zero Yeti Compatible with Anderson Powerpole 6ft/1.8m.

It also seems like the Xiaomi Mi M365 scooter uses the same plug in its charger so they are relatively common to find.

 

[john61ct]

OK looks like the 8mm is a Lenovo "standard" laptop tip, identical to both the Yeti and Sherpa input plug.

Not a common tip size until Lenovo switched to 20V with their laptops requiring 90W power supplies.

Most vendors list the precise spec as 7.9mm OD, 5.5mm ID with positive center pin (positive for Lenovo, TBD for Yeti.?)

but apparently some of the universal tip vendors go down to 7.7mm OD, which presumably works OK.

Some detailed discussion here: https://forum.thinkpads.com//viewtopic.php?t=57469

This shows precise measurements
http://www.bixmart.com/LC80--Right-Angle-Connector-Converter-for-IBM-Lenovo-Laptop-Power-Adapters-_p_197.html

Sources

http://m.ebay.com/itm/DC-Power-Tip-Plug-Connector-with-Cord-Cable-For-IBM-Lenovo-7-9-5-5mm-/262776227220

http://www.bixnet.com/dccotipforib.html