Silverfish battery fitting

[Howz]

I have just purchased one of these batteries. I was wondering how people fit these to the frame down tube? I have the water bottle bolts that I can use and drill 2 holes through the slide rail, but looking at the metal slide rail I don't think there will be enough room to slide the battery over? Has anyone fitted one of these? thanks

 

[RoadieRoger]

This design of battery normally slides down a rail fixed to the seatpost frame/tube . Either the seatpost has to be removed or some seats have a mechanism to tilt forward to enable the battery to be fitted/ removed . Was it your intention to fit it to the other tube usually holding a water bottle ie the one connecting the crank to the headstock ?

 

[Howz]

Hi , Yes the intention is to fit to the water bottle fitting, I may have to make a special bracket I think, Was just wondering what other people have done as I am sure I am not the only one?

 

[RoadieRoger]

Yes a bit of fabricating required . The water bottle holes are fairly close together for supporting a fairly lengthy and weighty object . A strip of aluminium about 1/8 - 1/4 in. thick by 1 in. wide or slightly more could be bolted to the frame using the cage threaded holes . . Perhaps you could then fix the rail that came with the battery to this . You could fix a hinge at the bottom so that the battery could be moved through an angle to make removal easier . You could also fashion some clamps around the battery to either fix to the 1 in. strip or to the bike`s tube .
Of course you could use clamps to fix it to the seatpost tube as well. if your system lacks rigidity . The weight in this method would be more concentrated and avoid twisting/ bending forces which will arise in your first method .
If you can purchase aluminium section rather than strip it would make the set-up more rigid and easier to fix brackets to .

 

[vfr400]

I'd make at least two 25 x 3 mm steel strips in the shape of a square "U" with internal size to fit the shape of the battery. Maybe bend the ends over at more than right-angles. Screw them to the bottle fixings with countersunk screws. That makes a channel to drop the battery into. If it were mine, I'd add another rivnut so that I had three hoops making the channel. Then you could use large O-rings or some bungee elastic to hold the battery in. You might need to fabricate an end-stop of some sort to stop the battery bumping on the frame at the bottom.

https://www.ebay.co.uk/itm/Fixed-Holder-Rubber-Elastic-Bandage-Battery-Strap-Motorcycle-Stretchable-Belt/333121638056?hash=item4d8f98cea8:g:mkMAAOSwgs5cj09L&frcectupt=true

Sort of like this.

 

[Howz]

Thanks both, I’ll let you know how I get on.

 

[RoadieRoger]

Next time you pass a Road Sign you will notice that on the back there are usually metal sections to contain sliding adjustable clamps and these clamp around poles supporting the sign . Instead of poles think of your Battery being clamped and the metal sections as being bolted to your bottle fixing threads ! There you are , that`s sorted .

 

[Howz]

So I have had a go at mounting this, I drilled holes through the battery bars so that it would fit the bottle cage holder holes, I then put a nut and bolt through the bracket holes with a washer each side, tightened them up so that they are tight on the bracket, but can still be turned with a spanner, I then used the spanner to tighten th m into the bottle holder holes, finished off with a few tie wraps...although I think I will change these for either rubber or heavy duty tie wrap cables. Just waiting for a control box to be delivered.

 

[Nealh]

In case you need to remove the battery for charging or winter etc,etc, use Velcro straps or reusable cable ties.