Does the 2A model auto re start when the energy comes back after an energy outage? Any manual intervention needed?

Yes. All is automatic. No need for manual operation. Thank you!

What difference does the amperage makes? How to choose between the 4 available models? This would be for a harley bike.

I have a two, a three, and a five amp battery tenders for my Harley Davison‘s Why different is because I use them on my cars and pick up sometimes The batteries are almost fully charged when I hook up the battery tenders so I’m not worried about overheating them A two amp would work fine for you

Will this charge batteries that are in a "series"? my scooter has 5 batteries, 12 v 12 ah sla in series for a total of 60 v. will this maintain all 5?

No. The batteries should be separated. The charger is for 12V batteries only. It cannot charge a 60V system.

why did this charger turn off and let my battery die over the winter only to turn back on after i recharged the battery with a different charger?

The charger will not charge a battery that is completely dead so if something happened (power outage etc) and the battery died completely then that would explain what happened. There has to be at least a small charge left in the battery for this charger to charge the battery.

ASIN	B01DYE5H9C
Best Sellers Rank	#36,108 in Automotive ( See Top 100 in Automotive ) #184 in Battery Chargers
Customer Reviews	4.5 4.5 out of 5 stars (1,466)
Date First Available	April 7, 2016
Is Discontinued By Manufacturer	No
Item Weight	13.7 ounces
Item model number	MP00207A-UK
Manufacturer	MOTOPOWER
Product Dimensions	6.89 x 2.36 x 1.77 inches

MOTOPOWER MP00207A 12V 2Amp Automatic Battery Charger for Lithium Ion Batteries

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Common Questions