[M FORBES LTD]

My battery ran out half way through the day and now i need a spare where do you get them from?

[H h20]

Here you go,try these im not 100% sure if its the same but you can always ask them,Gaz 
http://www.cleantech.co.uk/product_info.php?cPath=25_84&products_id=635

[windows_chepstow]

My battery ran out half way through the day and now i need a spare where do you get them from?

How old is your battery?  Mine's not failed me yet; even when I forgot to charge it once.

Apparrantly it can pump 420 litres out on a single charge, but the most I use doing tops only is 200 litres tops.  So it's got plenty of spare capacity.

Saying that, setting two on the back pack used to give a good squirt, but now I have to use setting three.

Why not give Williamson Pumps a phone call.  They sell spares.  I'd be surprised if a battery of that size would cost more than £20.