Hailong HL1 36v Batteries - on/off switch - yes or no?

[saneagle]

Woo-hoo!
Charged the battery this morning and the charger light turned to green after about 2 hours. Measured the voltage at the discharge socket as soon as it turned green - a full 42 volts, so it seems to balance OK.
I will obviously need to keep closely monitoring it and on the rare occasions that I do a journey exceeding 30 miles I'll be taking my other battery with me as insurance.

Having bought another battery I am now in the nice but unexpected position of having two, but my usage is quite low (short rides of 3-8 miles about 6 -10 times per month). One is brand new and the other 21 months old.
How should I best manage them? Do I use them alternately? Should I run them down to say, 34 volts before charging? Before now I've always charged to full, then immediately done a short ride to give some "headroom" for a 10 minute charge if not used for a while - is this a good procedure?

I expect all these questions have been answered before, but searching the net seems to give conflicting information. I'd be grateful for some clarification from those with more experience.
Once again, many thanks to those who have given me guidance, I've learned a lot!

They each need to be charged from time to time to prevent going out of balance again, so I'd alternate them. I wouldn't charge after every ride if the rides are short. The cells should last a lot longer if you store the batteries at anything less than full, but not empty or nearly empty, so I'd use each until they're about half-way down, then charge fully. Ideally, charge before use, not after, so they don't stay full too long.