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It is likely acid from your battery and could be caused by overcharging, but that is actually quite common on flooded batteries as they age. They are not sealed, so they can vent during overcharging or even very hot situations or during extreme vibration. We suggest typical alternator output to...

koda2000, I appreciate your feedback, as I too am always interested in learning something new. As I mentioned previously, I'm not an alternator guy, which is why I lean heavily on my friends in the industry who are. They have indicated slipping belts are not an issue unique to v-belts at all...

my white eddie, I see a lot of electrical terminology being used incorrectly in this thread, which may hamper some of your efforts. Most auto/light truck batteries have a capacity of 50-70 Ah (some people refer to this as amp-hours). This number indicates how much energy can be stored in your...

So SwaintaN, to answer your question about your battery, it is probably hissing or making some kind of boiling noise because it is venting. Although you didn't mention what kind of battery you have now specifically, I presume it is some kind of maintenance-free battery. When batteries vent...

Physically, Group 34 batteries are slightly shorter length-wise, slightly narrower width-wise and slightly taller height-wise, when compared to Group 65 batteries. This link provides general measurements for most of the BCI group sizes on the market. We can probably blame automotive engineers...

F150hybred, the battery in your link is a Group 65 battery, which is a different size than either the D34 or D34/78. I'm not allowed to comment on other specific manufacturers or retailers, but I would encourage anyone considering a battery purchase to read the warranty terms and procedures of...

Rick, it was a pleasure meeting you as well! Stic-o, I do understand the pressures the economy places on everyone. Frankly, when I look at where lead prices have gone in the last ten years (not to mention fuel prices), I'm surprised battery prices haven't tripled to keep pace. Jim McIlvaine...

Hi Stic-o, What you described sounds like the characteristics of a 7 year old battery at the end of it's useful life. Good luck with your new battery! If you find yourself battery shopping again within the next 7 years, I hope you'll give us another look. Jim McIlvaine eCare Manager...

Hi Stic-o, I'm sorry to hear your RedTop no longer works. I was wondering if you could tell me what the voltage of that battery is and the circumstances surrounding it's demise? As you've now noticed in the increased price of batteries, lead prices have more than doubled since 2005. Using...

I apologize for the delay in responding guys, I've been on the road quite a bit lately. Joe, you can view the specifications of all of our YellowTop batteries here. (Thanks for posting Anime) Most of our YellowTops are considered direct-fit replacements in your vehicle, except for the Group 51...

Hi Rick, We recommend a 10-amp maximum rate for battery chargers. If you have any other questions, please don't hesitate to ask! Jim McIlvaine eCare Manager, OPTIMA Batteries, Inc.

Hello, I noticed your conversation and wanted to offer some assistance. There is quite a bit of information to cover, so I apologize in advance for running long. While we did eliminate pro-ration from our warranties, the free replacement period on our warranties has only been increased over...

Hello, I noticed your conversation and wanted to offer some assistance. CALDWELL, given the demands of you audio system, I would recommend either a D34 or D34/78 YellowTop (thank you section525 for posting the screen grab). YellowTops are also appropriate for other deep-cycle applications...

hworksinc, I understand your reservations about our SpiralCell design. If our cells were not installed under compression (versus someone inserting flat plate cells into a case by hand), we probably wouldn’t be making very good use of the space we do use. As it is, seeing an Optima last 15...

Hello, I noticed your conversation and wanted to offer some assistance. tuggey, if you are planning on running a significant aftermarket audio system (and it sounds like you are), you should definitely be considering a battery that is designed to be deep-cycled, like our YellowTops. An...

We're actually in agreement with you and suggest 2 amp charging rates under normal circumstances for our batteries and 1 amp for float charging. We will suggest a 10 amp rate if a battery has been deeply-discharged and allowed to sulfate, but that should only be necessary for about two hours...