wrong battery

ok so my battery fails to start on a regular occasion even tho i have only had it around 7 months. i friend of mine told me it was wrong type i have 70ah and it should be 110ah is this correct. also what cca should i be looking for

cueball said:

ok so my battery fails to start on a regular occasion even tho i have only had it around 7 months. i friend of mine told me it was wrong type i have 70ah and it should be 110ah is this correct. also what cca should i be looking for

Click to expand...

70a is a little low, 80 or 90a would be better.

With regard to cca, 800cca minimum.

When you got your new one, did you put it on charge for at least 12hrs before use?


Do a Google search for Tayna batteries.

in a nutshell: you need a min. 850CCA battery(the greater the better), that's the most important, about the AH, the greater it is the longer it will take untill it discharges when stationary. A 70AH battery is quite weak for Td5

I bough a new battery for my td5 last week after the original battery died got a 110amp 850 cold crank £90 inc vat

darrenm said:

I bough a new battery for my td5 last week after the original battery died got a 110amp 850 cold crank £90 inc vat

Click to expand...

^^^ that's perfect

thanks guys

It's ether 664 or 665 battery code

Interesting, my TD5 is fitted with an HB072 which is 510 CA and only 68AH, not had a problem with starting although I appreciate a bigger battery would be better. (previous owner put this in and it's still fine, so I'll change it if it fails)

Before you get another battery I would check all the terminals and earthing points, if it works ok on mine it should on yours too!

I have fitted a flying lead to the battery with my own small connector that comes through the grill and sits behind the front A bar. As we dont use the Landy much its dead easy to stick it on charge (or in my case on a proper battery maintainer) to keep the battery for the inevitable cold day when it is needed.

m500dpp said:

Interesting, my TD5 is fitted with an HB072 which is 510 CA and only 68AH, not had a problem with starting although I appreciate a bigger battery would be better. (previous owner put this in and it's still fine, so I'll change it if it fails)

Before you get another battery I would check all the terminals and earthing points, if it works ok on mine it should on yours too!

I have fitted a flying lead to the battery with my own small connector that comes through the grill and sits behind the front A bar. As we dont use the Landy much its dead easy to stick it on charge (or in my case on a proper battery maintainer) to keep the battery for the inevitable cold day when it is needed.

Click to expand...

That's why that battery still works, it's way too weak for a Td5 ... use the car often with the hard consumers on(heated screens, heated seats, main beam, etc) and it will die in no time

That's why that battery still works, it's way too weak for a Td5 ... use the car often with the hard consumers on(heated screens, heated seats, main beam, etc) and it will die in no time

Click to expand...

I am budgeting for a new battery, but will continue as is until we have to replace it. Tayna seem pretty good value, thanks for that tip!

sierrafery said:

That's why that battery still works, it's way too weak for a Td5 ... use the car often with the hard consumers on(heated screens, heated seats, main beam, etc) and it will die in no time

Click to expand...

Come on... as these items are ignition-switch controlled (at position 2) we would therefore expect the engine is running and the alternator taking the load.

The standard battery is just to start the engine and support low load functions such as radio, interior and parking lights and security system.

i don't have time now to explain based on Kirkhoff's law for closed circuits and demonstrate that if the battery is weak the alternator will not take over the whole load...but i might come back with this ...if the battery would have been "ignition switched" off by the circuit while the engine/alternator is running how would it charge it? ...it's there in parallel and due to the fact that it's pure DC in it with low internal resistance , not a redressed alternative current, it takes enough of the load believe me