Jetson Bolt Pro External Battery Part 1 - Longer Range

We add an external battery to increase the range on the Jetson Bolt Pro ebike
Please help support my channel:
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Bike Rack
www.amazon.com/gp/product/B08...
Battery from ebay
www.ebay.com/itm/36V-8AH-Li-i...
Battery from Amazon (USA warehouse)
www.amazon.com/gp/product/B08...
Deans to XT60 adapter
www.amazon.com/gp/product/B08...
XT60 Parallel Connector
www.amazon.com/gp/product/B07...
XT60 male/female connectors
www.amazon.com/gp/product/B07...
Zip Ties
www.amazon.com/gp/product/B08...
14 gauge wire
www.amazon.com/gp/product/B01...

[@TheGonzace]

This is awesome. I have been wanting to look into a way to get more mileage out of the bike. I knew an extra battery was it but this is fantastic shows wiring and all.

[@JoediyLab]

Thanks Cesar

[@rexxywealth2751]

Good job You are a good teacher Thanks for the video It was helpful

[@JoediyLab]

Thanks for the feedback

[@jeffchef420]

Lucky the bare ends of that xt connector on the blue battery didn't touch!

[@lauraaguirre2460]

Very well explained!.

[@JoediyLab]

Thanks

[@skippyyoung7872]

Thank you! Thank you! New Subscriber!

[@JoediyLab]

Thank-you

[@DanielinLaTuna]

I got the original Jetson (with pegs, no pedals) so when I run out of power, I walk. This series is very interesting to me for extending my range. (I initially thought the limited range wouldn’t be a problem - it is!) When the Pro came out I bought one for my younger sister, who’d been interested in an ebike, but didn’t want to risk losing a “good” one ($2,000+) to theft. These Jetsons are a real value for the money, I think. Thanks for your timely videos. Daniel

[@JoediyLab]

Thanks Daniel

[@clementvenne5470]

Thanks Joe, Your explanations are precise and very detailed. Did you do a road test with your two batteries? In addition to the improvement in distance, did you notice an increase in your speed. I weigh 180 lbs and only get 14.3 miles per hour with my regular Bolt Pro

[@JoediyLab]

Yes, just posted a distance test with the external battery. Check my page for the latest video

[@TheGracieVshow]

Hi, thanks for the video! For those of us who are not comfortable with soldering, do you have any suggestions for crimp connectors or similar? Thanks!!

[@JoediyLab]

Hi Gracie check out this link≤ you can use a heat gun with these connectors www.amazon.com/120PCS-Solder-Seal-Wire-Connectors/dp/B07S62KYSL/ref=sr_1_3?dchild=1&keywords=solder+heat+shrink+connectors&qid=1615343746&sr=8-3

[@scottystiffchicken]

You seem to be on top of your game when it comes down to wiring and such, my question to you is why didn’t you just cut off the Deans connector and put on a xt60 therefore not needing the adapter?

[@JoediyLab]

Hi, Yes that is a good question., I move my batteries to different scooters and ebikes, alot for testing different combinations of batteries and controllers so I try to standardize on one set of connectors. Makes the transition easier. But yes in most folks situations it would be good to keep the same type of connector.

[@andremartel828]

14 AWG is small. I would use a larger guage like 10 AWG to prevent over heating. I would install a selector battery switch rather than have the batteries in parallel.

[@JoediyLab]

The bolt pro has a 350 watt motor, Let say it is under rated, common practice. Lets use 500 watts, 500 watts at 36 volts is 13.8 amps, well within the limits of 14 gauge wire. I mention to use a switch in the video.

[@jgc5782]

Thanx for the video Joe....you mentioned that we use14 gauge for discharge.....can you tell me the gauge of the charging wire...since I am only charging at 2 Amps or less....Tanx

[@JoediyLab]

Here is a chart for you, Depending on the length: wiringproducts.com/pages/wire-amperage-capacity-chart

[@fallingawake2092]

Hi there great video. I was wondering if the controller just evenly pulls the same amount of power from each battery at the same time or? I was assuming I would have to unplug the first one after it drains....and plug in the 2nd still fully charged battery afterwards?

[@JoediyLab]

Ideally both batteries should have the same rating, that way they will discharge evenly. More than likely one battery will discharge unevenly, which could cause some issues. So if you can try to keep the batteries the same rating.

[@fallingawake2092]

@@JoediyLab Ok Thanx for the response. I think I'll hook them up to a switch to be able to switch over to my secondary after the first one dies.

[@JoediyLab]

Yes, that is a good idea.

[@ciliciaann3504]

@@JoediyLab When you connect two batteries in parallel you're essentially create one bigger battery. I don't believe the smaller one will discharge faster. Also wired this way never drain one battery then plug in the other battery without disconnecting the dead battery. Doing that will cause the good battery to dump to many amps into the dead battery. The charger is probably only 2 amps. I would also disconnect both batteries when charging them and check the voltage to make sure they both are within a tenth on a volt before plugging them back in. For goodness sake don't have live bare wires anywhere near each other. Unplug those leads! I was waiting for the boom, sparks and fire. Yes the BMS has overload protection but why torture it or burn it out or even worse. ⚡🔥 Have fun and keep the shinny side up. 😎👍

[@toasty925]

Do you know the specs of the female charging port? I have a spare 36v battery with the charging port snipped off and I’m looking for one

[@reefgratos2035]

Just got the bolt pro and i also want to add a second battery.. but 36v 10ah seem expensive… can we just put a 36v 4ah on the rack bike? As long it is 36v we can put any ah right? I know we won't get much out of 4ah but i only need 5 extra miles..

[@JoediyLab]

Hey reef, check out my description on the battery videos, I ordered mine from ebay, from China, no problems, But yes you could use a smaller battery.

[@anio6865]

Can I ask you ? How many inches wide is the front fork where the the axel goes ?

[@JoediyLab]

Sorry I am out of town currently, Will not be back for several months

[@willfulignorance2848]

I did this but easier to charge both batteries. I extended inside battery wires and drilled holes on the frame to hide all the wires.

[@JoediyLab]

Yes, if your batteries have the same amp rating you can charge together. The batteries I have were not matched. Thanks

[@anio6865]

The xt60 14awg will also work with a 48v 20ah yes ?

[@JoediyLab]

The max amps taken by the motor is around 13 amps so yes 14 gauge should be fine.

[@paulasmith8173]

Where did you get your rear bike rack,And who makes it

[@JoediyLab]

Hey Paula Amazon link is in the description. Thanks

[@roadtripnipakundo]

i work on hotel and found a jetson.we have some wires cut trying to find shop to fix.

[@JoediyLab]

Let me know if you need any help?

[@virgiliovaldez5319]

What volt of the battery using in the external battery

[@JoediyLab]

36 volts

[@virgiliovaldez5319]

@@JoediyLab thank you

[@martintrevino6688]

You don’t require a fuse in between?

[@JoediyLab]

If you want to add a fuse on the second battery, that would be a good choice. The primary battery has a fuse already installed.

[@trumpet0123210]

Can we use instead a36v 20ah battery instead ?

[@JoediyLab]

Yes, just make sure the battery is the same size as the original battery. or mount the battery on a bike rack.

[@benstenson38]

What battery should I get for the most Myers To upgrade

[@JoediyLab]

If you want to put the new battery in the existing space, then the battery I listed will work. If you want a larger battery then take a look at by video that mounts an external battery.

[@benstenson38]

@@JoediyLab Can you take 2000 bolts of power and put it in Dubai

[@benstenson38]

@@JoediyLab what is the limit it could handle

[@JoediyLab]

@@benstenson38 If you want the battery to fit in the provided space then your are limited. But if you want to mount an external battery, then you could fit any 36 volt battery

[@JoediyLab]

@@benstenson38 ;-) sure you can, let me see the video

[@virgiliovaldez5319]

Can I use 48v or same volts the 36v

[@JoediyLab]

For 48 volts you need to upgrade the controller, pretty cheap to do that,. Check on Amazon or ebay

[@virgiliovaldez5319]

Thanks

[@virgiliovaldez5319]

If I upgrade the controller, it is icrease the speed?

[@virgiliovaldez5319]

​@Joe's DIY Lab if upgrade the controller, the speed can be increase?

[@JoediyLab]

@@virgiliovaldez5319 yes the 36 volts controller has a governor, to limit speed,. New 48 volts controller does not. Or get new 36 volts controller with higher watt rating, that way you can keep the same battery.

[@FF_AlohaEdition]

Can I use a 44v battery on this?

[@JoediyLab]

Paul, you would have to update the controller to 44 volt battery.

[@aubreyrose3283]

NOOOOO you don't want to do this!! You DO NOT want to use a Y connector. If you do this power can flow from one battery to the other (assuming they arent at the same voltage). Or if one battery discharges faster than the other again power will flow from one battery to the other. This bypasses the standard charge port. For some battery controllers, this won't be a big deal but honestly, we don't know which controller is in the Jetson battery or the eBay battery you bought, so I wouldn't risk it. You stand a serious chance of frying your batteries or worse yet starting a fire. If you really want to do this you need something called a "Dual Battery Discharge Balancer" which will electrically isolate one battery from the other and allows the controller to pull from whichever battery is at the higher voltage. Yes, it's another thing to but and yes they aren't as cheap as a Y connector but for the piece of mind it's well worth it.

[@JoediyLab]

Batteries are same voltage, Batteries are disconnected and charged separately, indicated in the video. The external battery is a slightly higher amp/hr battery. The BMS's should handle the amp draw or regulate any over amp draw. If the primary battery discharges first then the external should be regulated by both BMS's.