Any question answered...

A consensus emerges...

This is going to be hard for everyone but- assume for one second that I'm an not well versed in Electricity and its Mysterious Ways.

I can think of two reasons for my battery to be going flat dead fast:

1. It's fucked
   
2. There is some sort of short in my cabling
   
   

Now I can do nothing about 1 so how would I go about chasing down 2?

I've had a look and cannot spot anything amiss apart from the insulation covering the wires that are soldered onto the battery has split due to flexing backward and forward when the seatpost is inserted, so I'm a bit stumped.

Is it just at the end of it's life? They only last so long.

It's under a year old, but yes that was my concern also.

I don't know how long they are meant to live.

They're Trustfire 900 mAh 3.7V batteries (2 of), which are Li-ion, and have integral protection PCB's.

I've no idea of how many charging cycles they're meant to take- but I was leaving them alone for 3-4 months at a time last year, which was ace.

Now, they don't last a week and that's rubbish.

Put them in the microwave.

Could be something wrong with the rest of the system that is causing it to draw more power.

Also true. But what?

Lube the batteries.

Don't have the foggiest about electronic shifting. But I guess most likely is something in the circuit that drives the derailleur servos? Although I would be surprised if it worked at all if something like that was gone. A good test would be to borrow someone elses battery and see if it behaves the same. Or wire up a little circuit with known resistance, run it from a fully charged battery and see if it lasts as long as it should.

Also true. But what?

Operator error?

Have you tried turning it off and on again?

Don't have the foggiest about electronic shifting. But I guess most likely is something in the circuit that drives the derailleur servos? Although I would be surprised if it worked at all if something like that was gone. A good test would be to borrow someone elses battery and see if it behaves the same. Or wire up a little circuit with known resistance, run it from a fully charged battery and see if it lasts as long as it should.

It's a made rather than bought battery, I could always put another one together though. I'm just a little cautious as the chap who made the current one said that soldering onto Li-Ion batteries could be "life changing", I presume in a bad way.

Yeah Li-Ion and Li-Po batteries really don't like to get hot.

They're Trustfire 900 mAh 3.7V batteries (2 of), which are Li-ion, and have integral protection PCB's.

I've no idea of how many charging cycles they're meant to take- but I was leaving them alone for 3-4 months at a time last year, which was ace.

Now, they don't last a week and that's rubbish.

Lithium batteries are temperamental things. It is common for them to go dead if left for a long time and no longer able to hold a charge. Sometimes putting them in a freezer can bring them back.

Or the microwave.

Don't believe a word Snottyotter says about putting batteries in microwaves.

I never listen to animals when it comes to Microwaves

You can use the oven, but it takes a lot longer.

I could just grab one of these: http://www.master-instruments.com.au/products/57994/BC12AAL.html

And then these http://www.ebay.co.uk/itm/2pcs-TrustFire-AA-14500-900mAh-3-7V-Protected-Battery-/150440866148

To make a quick test battery.

If someone has hit you, nerg them back.

If in doubt, nerg.

But please do not announce positive/negative rep every.fucking.time though. Thanks.

Repped^.

You fucking fuck.

nergged for balance

Nerged.^^

Are these pedals okay for riding fixed on? I know people rate the time atacs for fixed but these dont seem to have tension adjusters and I dont think I've seen any bikes on here with these old style time pedals so I'm just wondering