Hello, I noticed your conversation regarding our batteries and wanted to offer some assistance. cuervo, I’m sorry to hear about the problems you’ve been having with your YellowTop. Can you tell me what the key-off load is on your Suburban? We have a video (tech tips #7) on YouTube (I'm not allowed to post links), which explains some basic battery diagnostics, including how to check your key-off load. Depending on how new your Suburban is, it may need to sit idle for a 30-40 minutes, to make sure all the computers have gone into sleep mode.
A typical vehicle has a key-off load of about 25 milliamps. If your key-off load exceeds 100 milliamps, there is an electrical draw present, which can discharge a battery in a relatively-short amount of time. It’s also a good idea to re-check wiring, as there is no such thing as grounds that are “too good” and one-wire alternators are especially sensitive to good, quality grounds.
The key to long battery life, regardless of brand or type, is maintaining at least 12.4 volts in your battery at all times. If you are planning on storing your vehicle for extended periods of time, a battery tender/maintainer is an excellent investment, which will help extend the life of your battery. If you elect not to use a tender or maintainer, it’s still a good idea to make sure batteries are fully-charged when a vehicle goes into storage and the voltage is checked periodically to maintain 12.4 volts.
It’s also a good idea to check your voltage again, when bringing your vehicle out of storage. If your battery needs to be charged, the best way to do that is with a battery charger. Relying on an alternator to recharge a deeply-discharged battery can lead to a cycle of dead batteries and jump-starts, until either the alternator or battery fails.
Optima was acquired by Johnson Controls in 2000, but our quality has continued to improve under their ownership. Most of the “bad” batteries returned to us today are just deeply-discharged and work fine when properly recharged. Most battery chargers work fine on Optimas, but most chargers will not charge any battery that has been discharged below 10.5 volts. If you do deeply-discharge an Optima below 10.5 volts, we have another video (tech tips #3) on YouTube, which explains how to recover a deeply-discharged battery. If you have any other questions, I’ll do my best to answer them.
Jim McIlvaine
eCare Manager, OPTIMA Batteries, Inc.