Optima battery

[jambo]

Has anyone fitted the blue top. Can you please give a review on it as I was thinking of forking out the random but only if it's worth it and there are multiple benefits.


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[office888]

No spill, no maintenance, no venting...

As with all batteries, make sure you buy for a reputable dealer so you get the full warranty and can exchange it easily if it goes bad.

With that being said, I had an 8 year old Red Top. The only thing that killed it is that it went dead and I left it that way in my racecar for over a month.

[jeffstevens763@g]

not used one but have a Numax dual cycle on mine sealed, handle folds down flat and condition indicator had no probs with it

[Pikey Dave]

Billy, I've always had Optimas since I was let down badly by a dud "normal" battery. Can't say if they are worth the extra or not, but put it this way, I've just put a pair on the new boat👍 Tayna are good on price & service.
https://www.tayna.co.uk


.....sh1t happens.......

[jambo]

Originally Posted by Pikey Dave

Billy, I've always had Optimas since I was let down badly by a dud "normal" battery. Can't say if they are worth the extra or not, but put it this way, I've just put a pair on the new boat👍 Tayna are good on price & service.
https://www.tayna.co.uk


.....sh1t happens.......

Thanks Dave appreciate


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[jambo]

Originally Posted by Pikey Dave

Billy, I've always had Optimas since I was let down badly by a dud "normal" battery. Can't say if they are worth the extra or not, but put it this way, I've just put a pair on the new boat👍 Tayna are good on price & service.
https://www.tayna.co.uk


.....sh1t happens.......

Sorry Fave what rating of blue did you put on. They say I need a really good bat for this Merc. I have a Numax dual 110ah at present with 900 cold cycles


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[jambo]

Originally Posted by Pikey Dave

Billy, I've always had Optimas since I was let down badly by a dud "normal" battery. Can't say if they are worth the extra or not, but put it this way, I've just put a pair on the new boat👍 Tayna are good on price & service.
https://www.tayna.co.uk


.....sh1t happens.......

Dave what rating if blue top did you go for as I have been told I need a really big lump to start this Merc and I have a dual Numax 110ah 900 cycles on at present


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[Pikey Dave]

I have 2, one for the electrickery & one purely as a starter battery
These are the 2 I have


Optima Blue Top Battery BT Slim 4.2 (8006-252) (BCI 34M) BTSLIM4.2 AGM
Optima Blue Top Battery BT DCM 5.5 (8052-188) (BCI D31M) BTDCM5.5 AGM


The 4.2 is purely a starter battery & delivers 1000cca, the 5.5 has a higher AH rating but lower cranking amps & is physically bigger. If you're just fitting 1 , fit the 5.5 as it's dual purpose. I have the 2 linked with a blue sea mini ACR, works a treat.

[jambo]

Originally Posted by Pikey Dave

I have 2, one for the electrickery & one purely as a starter battery
These are the 2 I have


Optima Blue Top Battery BT Slim 4.2 (8006-252) (BCI 34M) BTSLIM4.2 AGM
Optima Blue Top Battery BT DCM 5.5 (8052-188) (BCI D31M) BTDCM5.5 AGM


The 4.2 is purely a starter battery & delivers 1000cca, the 5.5 has a higher AH rating but lower cranking amps & is physically bigger. If you're just fitting 1 , fit the 5.5 as it's dual purpose. I have the 2 linked with a blue sea mini ACR, works a treat.

Take
It 5.5 is for engine. I have a two
Set up as well got a DS Wilson 85 for pump


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[jambo]

Sorry only got your last bit now. Mine is just regulated with usual bat switch


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[Bigmuz7]

IIRC Merc specify a battery (of which that is one) that must have quite a high cranking output to get the engine spinning fast enough ?

[jyasaki]

I'm running a pair of blue tops in my boat. They are neat (no leaks) and compact, other than that, well, they're batteries.

Unless they're topped up regularly, a single just barely cranks my F115 after about a month of sitting. An hour on the charger takes care of that pretty well.

jky

[jambo]

Originally Posted by Bigmuz7

IIRC Merc specify a battery (of which that is one) that must have quite a high cranking output to get the engine spinning fast enough ?

Is my Numax 110ah 900 cca alright then


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[jambo]

Originally Posted by jyasaki

I'm running a pair of blue tops in my boat. They are neat (no leaks) and compact, other than that, well, they're batteries.



Unless they're topped up regularly, a single just barely cranks my F115 after about a month of sitting. An hour on the charger takes care of that pretty well.



jky

So they need maintained then. Are they not sealed units


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[Pikey Dave]

Originally Posted by jambo

So they need maintained then. Are they not sealed units


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They are sealed, jky is on about sticking them on charge for a while.


.....sh1t happens.......

[Razorbill RIBs]

Fitted a pair 4 plus years ago..... haven't had to touch them since. Fit and forget in my experience. Ran 150 Optus and now merc 150 4 stroke

[jambo]

Originally Posted by Pikey Dave

They are sealed, jky is on about sticking them on charge for a while.


.....sh1t happens.......

Dave I leave mine on rib on mooring all season and charge via the Ob. With the Merc's new alternator system would that suffice?


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[Pikey Dave]

Originally Posted by jambo

Dave I leave mine on rib on mooring all season and charge via the Ob. With the Merc's new alternator system would that suffice?


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Dunno about the new merc system. If the boat is on a mooring & running bilge pump etc. I'd be tempted to have 2 batteries & keep 1 exclusively for starting.

[Bigmuz7]

Originally Posted by jambo

Is my Numax 110ah 900 cca alright then


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Oooh its 10 years since my Opti 150 I dunno .. but the dealer specified that battery just for the engine, and I had another for the rest of the leccy .. and it was because the merc/mariner needed that cranking output from it

[jambo]

Originally Posted by Pikey Dave

Dunno about the new merc system. If the boat is on a mooring & running bilge pump etc. I'd be tempted to have 2 batteries & keep 1 exclusively for starting.

Sorry Dave that's what I do. I have a DS Wilson 85 ah for the pump and a Numax 110 ah 900 cca fir starting
Which has always been ok. It just I've herd the Erc needs a big bat but I think mine is big enough as it used to start a V6 te stroke 150ho

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