Second mounting point for frame battery

[Rickidoodah]

Frame batteries are now becoming more popular and appearing in more kits and are mounted to the frame using the two water bottle mounting points on the down tube.
I wondered if anyone has attempted to add a second mounting point to strengthen the arrangement, as it does seem like a potential week point.
I thought of installing a riv nut on the seat tube and somehow creating something to hold the battery steady at the position shown below (haven't figured out how yet though).

 

[Deleted member 4366]

Someone did crash and rip his bottle battery out of the frame. On mine, I added a rivnut to have three screws holding it. If you look at yours, theres room at the top of the slot for an extra one.

 

[Nealh]

On my 09 Woosh battery holder I added a 3rd using the top slot and a 4th lower down just above the machine screw holding the empty controller unit to the main holder. On the Oxydrive one I could only get 1 extra fixing, I have had 2 off's with mine the last buckling the front wheel quite badly yet the fixings have held despite being a carbon frame.

 

[D C]

I just bought some 2 inch wide genuine Velcro to fix a friends mobility scooter, it's really strong, I think it would be possible to devise a way to use it as a strap round the seat post and possibly top tube to help make the battery more secure.
around £6 for a meter may be worth a try.

Dave.

 

[baldylox]

After advice from d8veh, I added an extra couple of rivnuts to supplement the existing bottle mounts (as the lowest existing mount was unusable) and now have a very solid mount for the battery.

 

[Recy]

Can anyone recommend a rivnut tool and suitable size/quality rivnuts please? - maybe even a tool and a selection of rivnut sizes, preferably uk based.
Buddy skidded on the moss on paving today and uprooted the battery holder from the frame - luckily the extra support provided by the velcro straps idea above prevented something more serious!

 

[Deleted member 4366]

You don't need a tool, just two metal strips with 5.5mm holes in the end. If you've ripped out the 5mm rivnuts, you might want to think about repairing them with 6mm, which use a bigger hole.

• Drill the right size hole
• Put the riv nut in
• Put the appropriate screw through the holes in the strips and bring it to the rivnut
• Hold the rivnut down with the strips while you tighten the screw
• If the rivnut turns, stick a screwdriver between the strips and lever them apart
• Tighten the screw until the rivnut is fully rivetted

http://www.ebay.co.uk/itm/10-X-GROOVED-STEEL-NUTSERTS-RIVNUTS-BLINDNUT-4-5-6-8-MM-RIVET-NUTS-NUT-SERT-/291074449563?var=&hash=item43c563a09b:m:mUBaOKocAiorOMlPYKoK67w

 

[Recy]

Totally practical - thanks.