FYI Yuasa Battery

[cycling]

Model # YT 12B-BS.

Installed a Shorai Battery beginning of the season this year. Ducati Diavel 2012.

Thought I had given my Yuasa battery to a fellow rider. Wrong. Found it in the garage.

Therefore, it had not had a charge in 7 months.

Put it on a charge and it showed it still had 25% left on it. Charger X-Treme charge motorcycle.

Several hours later showed a full charge. Disconnected it for 2 days, just to see how it would remain in its charged state.

Showed fully charged within the hour.

Impressed.

 

[RockerGuy]

I generally disconnect my battery & leave it untouched for the whole winter. Never a problem come spring

 

[TwistedKestrel]

If you fully charged an AGM battery, disconnected it for two days, and then hooked it back up to an automatic charger, I would expect it to register as fully charged just about instantly. I don't know exactly how your charger works though

 

[TK4]

Yuasa (and Interstate - rebranded Yuasa) is top drawer. What you've experienced doesn't surprise me in the least.

 

[PrivatePilot]

Only a load test shows the true health of a battery. Voltage means very little - even a crap battery will often "charge" and show proper voltage, and yeah, even hold it for a period of time, but try to draw anything from it you soon discover that it's only a surface charge the battery has taken. Remove that surface charge and suddenly the performance/figures don't look so good anymore.

A battery that was left in a 25% state of charge for potentially many months has without doubt suffered from it. Take it somewhere that does a proper load test and I think you'd find that a huge percentage of it's rated cranking amps are now gone.

In the end, even a damaged battery will often still start an engine as long as it starts quickly..but any extended cranking (ie: it doesn't fire off immediately), or leaving an interior light or something turned on (radio, for example) will quickly demonstrate the capacity loss when the battery falls on it's face in short order. This comes full circle to a load test really being the only reliable health indicator of a battery, not just voltage of it's ability to hold it.