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Thread: Charge Your Bike/Car Batteries At Home

  1. #1
    Rusted harikishen's Avatar
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    Icon10 Charge Your Bike/Car Batteries At Home

    Hi friends,

    charging the batteries would be easier now.that to at your home.The problem with battery recharge shops is that their time is not flexible as its advised to charge batteries for 8 hours.

    For the below setup you will need:
    1.An UPS(home or pc UPS)
    2.A battery
    3.Thick wires(preferable)
    4.meter gauge(optional)

    Note:for best results flush the water in the battery and add new distilled water which can be found at the petrol bunk or automobile shops

    1.first open up the UPS.
    2.screws could be found at the bottom.
    3.After opening remove the battery terminal.If you like you can leave the battery or else you can remove it.
    4.connect the terminals with the dead battery thru a cable.
    5.**keep the caps of the water shells open while charging**
    6.power on the UPS and DONT PRESS THE POWER SWITCH OF THE UPS.pressing the power switch will direct the AC current to the power ports and the battery will stop charging please keep it in standby position.

    Charging for 8 hrs is preferred even though,my almost dead battery was charged at 6 hrs.

    Have been tested only with 5L-B battery.I think you can use all automobile batteries.I don't have any idea about cars

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    Moderator The Monk's Avatar
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    Default Re: Charge Your Bike/Car Batteries At Home

    DIY Approved
    @senior experienced folk. How good or bad is this please let us know your views.
    Biking is not about what you have between your legs, its all about how well you use it!!!!!!!

    Give your details here if you want to help your fellow xBhpian stranded in your city

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    Rusted rxdude's Avatar
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    Default Re: Charge Your Bike/Car Batteries At Home

    ^^ though not an expert, one has to be extra cautious when working on UPS as it has AC inputs and outputs unless you want to get a shock !!
    To charge a battery, you can buy a transformer (preferably a centre tapped one) and two appropriate diodes and capacitor and make a full wave rectifier. This is a simple method. The cons of this are
    This full wave rectifier doesn't have a auto cut off once the charge is complete.
    Also it provides a constant current which is not that good for a battery, initial constant current and later switching to trickle charging maybe good for the battery health.
    The above DIY may have the benefit of auto cut off and trickle charging as its a UPS.
    Correct me if I am wrong.


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    Rusted sandeepcf's Avatar
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    Default Re: Charge Your Bike/Car Batteries At Home

    For bike batteries use UPS
    For car batteries use home inverter

    For severely discharged batteries and for very super quick charging I use Laptop charger. O/P is 19V and AMP rating is nearly 4 amps. I disconnect the lappy charger when the battery voltage reaches 15V(with charger still connected).

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    Rookie DebayanS's Avatar
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    Icon6 Avenger 220 Battery Charging

    Hi friends,

    Recently i faced a discharged battery issue while travelling. It was very annoying as it was around 11:30 at night and my bike, avenger 220, did not have a kick start.
    I was not able to crank up my bike only. It was already so late at night and i knew i wont find any battery charging shops open and i needed the bike for my daily commute to work as well.
    So i pushed started my bike and reached home. I did not want to go to a battery charging shop and give my battery there as they sometimes dont charge it properly ( at least 8 hours) So i thought of charging it at home only. Here is what i did to get a fully charged battery at home

    Tools needed
    1. 10 size spanner and a flat head screw driver
    2. Distill water (available at petrol bunks) - Rs 20
    3. Thick wires (1 meter would suffice ) - Rs 15
    4. Funnel
    5. Insulation tape (black or red)
    6. PC UPS
    7. Protective clothes (dealing with acid here!!)
    8. Patience

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    Precautions
    Be careful while draining the acid from the battery. It should not come in contact with your skin. If it does wash immediately.

    Steps By Step Procedure
    First open the right side cover of your bike to reveal the battery. Open the 2 nuts marked in image to release the holder of the battery.
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    Once its open , remove the rubber caps from the battery terminals and unscrew the terminals using the flat head screwdriver.
    Then take the battery to home and clean it first of all the dirt and muck.
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    Once clean open the water caps and check for the level of water inside and refill as needed.
    Use a funnel for putting in the water. I made a funnel out of a bottle.
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    Since my battery was very thick i could not make out the level with a torch.
    So placed a bright source of light behind it in a dark room and checked.
    The setup for same:
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    and the result for flawless checking
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    Once the water is filled to the desired level. its time to connect to the UPS for charging.
    Open the UPS from below to reveal the battery. The battery is connected with clips.
    Just unhook them and remove the battery. Once removed connect the wires to the terminals and tape them with the insulation tape.
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    Do the same with the battery terminals. Make a tight loop with the wires and tape them down tight.
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    Once all the connections are done check for loose contacts. If all is well then its time to charge
    Just connect the UPS plug to the outlet and switch it on.
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    Points to NOTE:

    1. Leave the battery caps for water open while charging.
    2. Do it in a well ventilated area.
    3. DONOT press the power on switch of the UPS. Keep it in standby mode. If its switched on then direct current will flow to the UPS and the battery wont get charged.

    keep the battery on charge for 8 hours and you should be good to go the next day
    phanikar, jacob, aargee and 5 others like this.
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    They mark their Territory.

    Bajaj Boxer -> 2003 - till date
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    More to be added :-)

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    Addicted HeartBrokenBiker's Avatar
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    Default

    Awesome DIY @DebayanS

    Quote Originally Posted by DebayanS View Post
    3. DONOT press the power on switch of the UPS. Keep it in standby mode. If its switched on then direct current will flow to the UPS and the battery wont get charged.
    direct current? You mean Alternating Current?

    Quote Originally Posted by rxdude View Post
    Also it provides a constant current which is not that good for a battery, initial constant current and later switching to trickle charging maybe good for the battery health.
    The above DIY may have the benefit of auto cut off and trickle charging as its a UPS.
    Correct me if I am wrong.
    Since it's a lead acid battery, trickle charging happens naturally even if you provide constant current.
    Last edited by The Monk; 11-01-2013 at 01:12 PM. Reason: Consecutive Posts
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    Default Re: Avenger 220 Battery Charging

    Good job . I am using the same APC ups model as my battery charger since a few years now and it works well . A few observations from my experience with it -
    1) no need to leave the top-up caps open , the battery has vents for expelled gas . The caps if left open may introduce dust and dirt into the electrolyte and that's not good for battery - why else would they ask to use distilled water .

    2) With this and most APC brand UPSs there is no need to turn on the UPS itself to charge battery . The UPS starts to charge the battery as soon as it gets mains( AC ) power at it's base plug . But charging does not stop if it is turned on - only it's unsafe ( as then the power outlets on the UPS get live ) and UN-necessary to do so .

    3) Better to solder the wires and connections permanently and cover the joints with heat-shrink tubing - for safety . It is easy to find discarded UPSs these days at computer shops since most people just throw them once battery gets exhausted and buys new . Mine is like that - dedicated battery charger .

    4) Never top up battery electrolyte with water before charging . Always do that after full charging - if necessary . The electrolyte level rises up after a charge - and if topped up before it can overflow . Also never add any external acid to a battery .
    srikany and DebayanS like this.

  8. #8
    Rookie DebayanS's Avatar
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    Default Re: Charge Your Bike/Car Batteries At Home

    Quote Originally Posted by HeartBrokenBiker View Post
    Awesome DIY @DebayanS

    direct current? You mean Alternating Current?

    Since it's a lead acid battery, trickle charging happens naturally even if you provide constant current.
    Thank you @HeartBrokenBiker
    ya by direct current i meant AC current

    And i dont think trickle charging happens naturally.. then the UPS battery should get charged while using it.. but it doesnot.. i might be wrong though..
    Bikes don't leak oil,
    They mark their Territory.

    Bajaj Boxer -> 2003 - till date
    Bajaj Avenger -> 2011 - till date
    More to be added :-)

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    Default Re: Charge Your Bike/Car Batteries At Home

    Nice thread, Very helpful

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    Moderator B7ACKTHORN's Avatar
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    Default Re: Charge Your Bike/Car Batteries At Home

    Very good indeed. I have a UPS that's about to get junked, now I think I've found a simple, easy and jugaad to fix. But what about VRLA guess they work the same way?

    Cheers!
    VJ
    Once upon a time, a guy asked a girl 'Will you marry me?'
    The girl said, 'NO!'


    And the guy lived happily ever after and rode motorcycles and watched sport on a big screen TV, went fishing and surfing, and played golf a lot, and drank beer and scotch and had tons of money in the bank and left the toilet seat up and farted whenever he wanted.


    THE END

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