Adding an extra battery to stock razor - Pocket Bike Forum - Mini Bikes
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post #1 of 25 (permalink) Old 07-24-2006 Thread Starter
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Adding an extra battery to stock razor

hi,
i just picked up a razor scooter the other day without a charger and what i think is a dead battery. I was wondering if it would be safe to add a third or 4th battery to the stock setup. my goal for right now is to increase the riding time. If adding a third or fourth battery does increase the ride time, would the ride length increase alot? also would i need to modify the wiring to the controller?

Thanks,
Andrew
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post #2 of 25 (permalink) Old 07-24-2006
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Re: Adding an extra battery to stock razor

you can't just add an extra battery,you must also upgrade the controller.if you just want too increase your riding time you can just buy another battery with more mah with same volt's.this way you can still keep the stock controller.what kind of battery is on the bike now and how many watt's is your motor?
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post #3 of 25 (permalink) Old 07-24-2006 Thread Starter
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Re: Adding an extra battery to stock razor

not sure on the specs of the bike because i didnt get a manual or anything. since i already have 4 batteries and i found out how to fit all four of them nicely, could i just wire the batteries in series parallel which would result in 24v? would thise double the mAH? what i am still stumped about is how to connect the four batteries to the controller. would having more batteries increase the charging time? if so, what can i buy to decrease the charging time.


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Andrew
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post #4 of 25 (permalink) Old 07-24-2006
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Exclamation Re: Adding an extra battery to stock razor

ive added a third battery for mine and it works but you gotta have a 36 V Charger Anymore batteries will blow Something.......... BTW i Hit 25.4 MPH Today With 3 Battieries And A Stock Controller oh yeah and for some reason when you charge the batteries the third on makes a sizling Does That Mean I need A Razor Mx-500 Controller ? Or What ?

Last edited by Kool-aid; 07-24-2006 at 02:50 PM.
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post #5 of 25 (permalink) Old 07-24-2006
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Re: Adding an extra battery to stock razor

there are two version's of the bike,one is a razor 24v and a honda minimoto which is 18v.let's say you have 2 12v 7ah batteries now connect the wire's(+)positive to (-)negative,this will increase the volts too 24v 7ah.if you connect the (+)positive too (+)positive and (-) too (-) it will increase the mah too 12v 14ah.
the controller only needs one postive and one negative wire from the batteries.
what kind of batteries do you have?

Last edited by werker011; 07-24-2006 at 03:58 PM.
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post #6 of 25 (permalink) Old 07-24-2006
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Re: Adding an extra battery to stock razor

what batteries are you using?are they the same volt's and mah.
Quote:
Originally Posted by Kool-aid
ive added a third battery for mine and it works but you gotta have a 36 V Charger Anymore batteries will blow Something.......... BTW i Hit 25.4 MPH Today With 3 Battieries And A Stock Controller oh yeah and for some reason when you charge the batteries the third on makes a sizling Does That Mean I need A Razor Mx-500 Controller ? Or What ?
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Re: Adding an extra battery to stock razor

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Originally Posted by werker011
what batteries are you using?are they the same volt's and mah.
Yeah Three 12 V 7Ah Batteries
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post #8 of 25 (permalink) Old 07-24-2006
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Re: Adding an extra battery to stock razor

so your using the stock 24v controller with a 36v system.i tried upgrading my son's bike from 18v too 24v and it did'nt work.just keep a close eye on your controller if you are.
using a volt meter check all 3 batt's when fullycharged.check one battery at a time too see what volt's they have.would be best if all 3 batts show near the same volt's.
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Originally Posted by werker011
so your using the stock 24v controller with a 36v system.i tried upgrading my son's bike from 18v too 24v and it did'nt work.just keep a close eye on your controller if you are.
using a volt meter check all 3 batt's when fullycharged.check one battery at a time too see what volt's they have.would be best if all 3 batts show near the same volt's.
thats correct but even if i blow that controller i have i Mx-500 Controller come-ing in on Wed. but that controller is going strong (No Problems) but i have another in the gaurage 250 Watt motor 36 V With a stock controller and that thing is fast must go atleast 30 MPH (Dont Know the exact number Dont Have A Speedometer on that one)
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post #10 of 25 (permalink) Old 07-24-2006 Thread Starter
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Re: Adding an extra battery to stock razor

so is it safe to wire four batteries in series parallel resulting in 24v 14AH? i purchased the batteries from frys. where do you guys mount your batteries? my third battery is mounted under the rear fender and the fourth is mounted where a gas tank would normally go. the 4th battery lifted the cover alittle so i had to put two spacers in the midle. i think i may be able to squeeze another battery where the two stock batteries are.


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Re: Adding an extra battery to stock razor

Quote:
Originally Posted by pinoymoomoo
so is it safe to wire four batteries in series parallel resulting in 24v 14AH?

Andrew
pinoy, no that is not correct...if you wire 4 batteries in series you will end up with 48volt...... what you need to do is this... fisrt 2 batteries wire up in series, then put it aside..... the wire up the other 2 batteries in series...... now wire both sets in series..now you wil have a longer riding time with the same speed you had before,,,,,,
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post #12 of 25 (permalink) Old 07-24-2006 Thread Starter
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Re: Adding an extra battery to stock razor

i was saying wiring the battery in series-parallel (Shown in picture) doing this would end up with 24volts but having 14aH because:

Wiring in Series will incease the voltage.
And
Wiring in Parallel will incease aH but not the voltage.

My batteries are rated 12v 7aH. Wiring in series/parallel will result in 24v 14ah. would 24v 7aH still be safe for the stock motor and controller? one other question i have is; is it safe to wire differt aH batteries together? for example two 12v 12aH batteries and 2 12v 7aH batteries? Where can i find a faster charger?

Here is a pic of a series/parallel wiring diagram


Thanks,
Andrew
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post #13 of 25 (permalink) Old 07-24-2006 Thread Starter
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Re: Adding an extra battery to stock razor

decided to go ahead and give it a try, so i wired them all up in series/parallel and hooked up the dmm to the plug. read ~24v. now to order a new charger. im assuming since i have two more batteries, it will take much much longer to charge. any suggestions on what kind of charger i should get? should i just get one off of ebay?


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Andrew
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Re: Adding an extra battery to stock razor

it's not a good idea to mix the batteries mah,12ah-7ah etc.i'll pm about the charger.

Last edited by werker011; 07-25-2006 at 01:03 AM.
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Re: Adding an extra battery to stock razor

you should get a speedo to see the difference between your stock controller and the mx500.

Quote:
Originally Posted by Kool-aid
thats correct but even if i blow that controller i have i Mx-500 Controller come-ing in on Wed. but that controller is going strong (No Problems) but i have another in the gaurage 250 Watt motor 36 V With a stock controller and that thing is fast must go atleast 30 MPH (Dont Know the exact number Dont Have A Speedometer on that one)
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Red face Re: Adding an extra battery to stock razor

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Originally Posted by werker011
you should get a speedo to see the difference between your stock controller and the mx500.
got the mx-500 controller in today popped that sucker in and re-wired Neons,Stobe Lights And battiery Put 250 Watt Motor And Rode That Sucka(Couldnt believe The diff.)
Hit 32.4 MPH

Last edited by Kool-aid; 07-26-2006 at 04:45 PM.
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Re: Adding an extra battery to stock razor

Dang thats FAST LOL. I think i might just get the razor after all.

Last edited by dommaster23; 07-26-2006 at 05:09 PM.
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Re: Adding an extra battery to stock razor

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Originally Posted by dommaster23
Dang thats FAST LOL. I think i might just get the razor after all.
Yeah and it feels even faster than that but it dint come like that i had to add a battiery change the controler upgrade the sprocket upgrade the motor not to even think about Strobe lights neon lights speedometer Alot of hard work but dang on dont it pay Off ?
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Re: Adding an extra battery to stock razor

Quote:
Originally Posted by Kool-aid
got the mx-500 controller in today popped that sucker in and re-wired Neons,Stobe Lights And battiery Put 250 Watt Motor And Rode That Sucka(Couldnt believe The diff.)
Hit 32.4 MPH
Wowza, And Your Motor Didn't Burn Out? We Tried Projects Like This, And Our 350's Keep Frying When We Tried To Push Them To 30 MPH, Heck, It Wouldn't Even Go Past 25! D:
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Re: Adding an extra battery to stock razor

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Wowza, And Your Motor Didn't Burn Out? We Tried Projects Like This, And Our 350's Keep Frying When We Tried To Push Them To 30 MPH, Heck, It Wouldn't Even Go Past 25! D:
it will go 25 MPH straight up A Hill i got the motor off of a electric Scooter on the back it says 250 Watts but who knows but it hasnt blew yet heres a pic of the sticker that was on the motor-

pic-
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