Yuasa LM80 Batteries

[cereal tiller]

Have just Installed 6 of these,they are described as CA/CA ,the Yuasa website does not state the charging or float voltage

Have not used CA/CA before,am thinking that 14.6 Volts for charge and 13.8 for Float would be about right?

CT

[cuthound]

Ca/Ca batteries are lead acid batteries that have had calcium added to both the positive and negative plates.

Calcium adds mechanical strength to the plates,  and reduces internal self discharge and gassing when on charge . However they do require a slightly higher charging voltage, typically 0.5 volts higher for a 12 volt battery than a pure lead acid battery.

So around 14.8 volts for alternator charging and for a multi-stage charger, bulk 15.2 volts, float 14.2 volts. 

 

 

[cereal tiller]

10 minutes ago, cuthound said:

Ca/Ca batteries are lead acid batteries that have had calcium added to both the positive and negative plates.

Calcium adds mechanical strength to the plates,  and reduces internal self discharge and gassing when on charge . However they do require a slightly higher charging voltage, typically 0.5 volts higher for a 12 volt battery than a pure lead acid battery.

So around 14.8 volts for alternator charging and for a multi-stage charger, bulk 15.2 volts, float 14.2 volts. 

 

 

Thank you Cuthound,will Charge to those Numbers.

CT

[Tony Brooks]

40 minutes ago, cuthound said:

Ca/Ca batteries are lead acid batteries that have had calcium added to both the positive and negative plates.

Calcium adds mechanical strength to the plates,  and reduces internal self discharge and gassing when on charge . However they do require a slightly higher charging voltage, typically 0.5 volts higher for a 12 volt battery than a pure lead acid battery.

So around 14.8 volts for alternator charging and for a multi-stage charger, bulk 15.2 volts, float 14.2 volts. 

 

 

In now way disagreeing with the Hound but that is for optimum charging. They will still charge properly at 14.6 but just take a longer time. Probably not what is wanted on most  canal boats.

[smileypete]

Sorry this doesn't sound helpful but it could be worth just contacting Yuasa and asking them...

If they fail or underperform down the line it should help if their charging recommendations have been followed.

Edited June 13, 2017 by smileypete

[cereal tiller]

On 6/8/2017 at 09:44, Tony Brooks said:

In now way disagreeing with the Hound but that is for optimum charging. They will still charge properly at 14.6 but just take a longer time. Probably not what is wanted on most  canal boats.

 

On 6/13/2017 at 20:50, smileypete said:

Sorry this doesn't sound helpful but it could be worth just contacting Yuasa and asking them...

If they fail or underperform down the line it should help if their charging recommendations have been followed.

Thanks Chaps,there was no Info. on the Yuasa Website and no reply from the Email I sent them.

They are now being charged by Boat's Engine or the DC Diesel Generator at 14.8,and Shoreline charging at 15.2 Bulk/Absorb then 14.2 Float

Unusual not to get any signs of Gassing at 15.2,but all seems good

CT

[rusty69]

15 minutes ago, cereal tiller said:

Thanks Chaps,there was no Info. on the Yuasa Website and no reply from the Email I sent them.

Pretty poor from Yuasa! Or  Yuasaless 

[smileypete]

On 24/06/2017 at 11:03, cereal tiller said:

 

Thanks Chaps,there was no Info. on the Yuasa Website and no reply from the Email I sent them.

They are now being charged by Boat's Engine or the DC Diesel Generator at 14.8,and Shoreline charging at 15.2 Bulk/Absorb then 14.2 Float

Unusual not to get any signs of Gassing at 15.2,but all seems good

CT

Ah well.

If they're 'maintenance free' wet batts, a look at the tail current will help tell how much gassing is going on, very low tail current will mean little or none.

A little gassing shouldn't hurt and may help keep the electrolyte mixed and keep it from stratifying.

Edited July 1, 2017 by smileypete

[cereal tiller]

30 minutes ago, smileypete said:

Ah well.

If they're 'maintenance free' wet batts, a look at the tail current will help tell how much gassing is going on, very low tail current will mean little or none.

A little gassing shouldn't hurt and may help keep the electrolyte mixed and keep it from stratifying.

The tail current will drop to 0.68 AMP. at 15..2 Volts and a similar figure at 14.2

Have used a Stethoscope on the Battery casings,complete silence..Spooky 

[rusty69]

16 minutes ago, cereal tiller said:

Have used a Stethoscope on the Battery casings,complete silence..Spooky 

Maybe instead of electrolyte, yours are full of electroplasm

[cereal tiller]

Just now, rusty69 said:

Maybe instead of electrolyte, yours are full of electroplasm

Oh dear,who am i gonna call!

[rusty69]

Just now, cereal tiller said:

Oh dear,who am i gonna call!

Dunno, do tell?