Testing batteries for E300s scooters

it will run slow for 40 mins at a slow speed, after 15 mins of running fast, the batteries get too hot

I posted a similar issue about the same scooter. If you do replace the batteries and still experience the same issue, check the wiring for loose wires and possibly replace the fuse.
After replacing the fuse and connecting wires, my scooter doesn't pop the fues with every use anymore.

http://www.fixya.com/support/t7752702-ride_scooter_turns_off

Note the charger doesn't turn itself off. It will only signal batteries are charged. You can overcharge these batteries by leaving them on the charger for too long. Suggested by retailer is two hours maximum.
Any case, Jackson Mack is correct on all counts there.
If the light is green on the charger, and the scooter still doesn't go, there might be some other issue besides the batteries themselves like loose wiring, fuse switch, etc.

make sure battery cables are secure at battery terminals and clean.how old are the batteries.If the batteries run down fast they are no good.a good way to test them is put scooter against some thing solid and go forward.If the battery indicator drops to o the batteries are no good.It takes about 10 hours to charge the batteries

Hey oscar suarez

Check out this manual and go to Page 13. There you will step by step directions on how to replace a Rear Wheel

Good Luck

I posted a simliar question. I ended up taking my scooter to a battery store that is licensed to work on razor scooters. They ulitmately concluded the wires to the popup fuse itself were loose. They replaced the popup fuse as well just incase. I have now been using the scooter without the fuse popping every 50-100 feet.

Hi. How many amp/hours are your batteries?
Who tested your batteries, and how did they test them.
I have had batteries tested by an auto electrical technician, who said the batteries were OK. I knew at the time that the batteries were faulty.
What he did was do a short high current test, that he would normally do on a car battery.
To test batteries in a scooter you have to do a constant current test on fully charged batteries, and monitor the battery voltage. When the battery voltage drops to 10.5 volts across the 12 volt battery, that is considered a flat battery. Take the time elapsed for the test, and you can roughly work out the amp/hour rating of your batteries.
The amp/hour rating of a battery is worked out on a 10 or 20 discharge. A 40 amp/hour battery can supply 2 amps/ hour for 20 hours.
If you take 20 amps per hour, you will not get 2 hours of use. You will probably only get 1.5 to 1.75 hours of use. The more current ( amps ) you take out of a battery, the less amp/hours it will supply.
The best way to test your batteries is a constant current test, but they take a few hours, or try new batteries.

Also how long do you charge your batteries for. Most chargers need to be on at least over night to fully charge your batteries.
Some chargers have a green LED that comes on when the batteries are nearly full. This green LED is a guide only, and most batteries still need a few more hours to do a full charge.
Good luck. Neil.

hi,

Can you clarifly what happens you plug in the charger in ?

Are you sure the fuses on the battery leads are okay ? the is one for each battery like a glass container ? check they have not blown, check the connections to the battery , are they tight ?

Regards
gewizrepairs.co.uk

THE CONNECTION BETWEN THE BATT.AND MOTOR IS LOSE

Be sure that the batteries were tested with a load tester. If it is not the batteries then ohm test the brakes. It should be around 35 ohms.