so a while ago I put on here that our transponder had died and tried to see if any one could sell me a replacement ??,a couple of people sent me a message saying "have you tried a battery ",at that time I didn't realise it was possible to replace the battery .,anyway it has been a complete success and ours is working fine now !!,I have just taken delivery of a box of these re-chargeable batteries so if anyone needs them come and see us at the 172 truck or call 07930 546959,mark /micky (£5.00)