Best voltage meter?

ESK8 Electronics
1

Hello Looking for the best battery metrr seen lots here but unsure which is the best? My battery is going to be 12s Thanks

2

afaik most people use this one: (or the green version)

https://www.amazon.ca/XCSOURCE-Waterproof-Lead-acid-Backlight-BI728/dp/B071GMVXFD/ref=sr_1_36?gclid=Cj0KCQjwhJrqBRDZARIsALhp1WRgUQ1EgS1BM4WxIoM8YkePETc49fMjN-tj6PisOEo2vOds414NhKcaAtXGEALw_wcB&hvadid=291738623912&hvdev=c&hvlocphy=9000792&hvnetw=g&hvpos=1t1&hvqmt=e&hvrand=10830863045839952669&hvtargid=kwd-302675938688&hydadcr=23341_10308595&keywords=voltage%2Breader&qid=1564941845&s=gateway&sr=8-36&th=1

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4

I have the 1st listed above unfortunately its percentage readouts are useless for my 30q pack. They are fairly accurate to start with, but become increasing inaccurate the more i discharge(Reporting ive much less range than i actually have). So now I use the discharge curves from the samsung specsheet and lygte-info.dk, to enter my own voltages/percentages into an app for accurate readings. I charge with a balance charger, so i know this method is accurate.

I stop riding for a few minutes to get an accurate reading too. If anyone knows of one you can calibrate discharge curves yourself please let me know.