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<blockquote data-quote="audiolife" data-source="post: 7651902" data-attributes="member: 541383"><p>Charge them with a good charger before installation depending how the battery was stored temps and resting voltage at time of storage will be a variable. When a battery discharges is sulfates and if left sulfated it can make the battery slow to recharge or not recharge at all because it can crystalize if not recharged. If an alternator gets a low sulfated battery it can cause it to go thermal and ruin the battery. This is why having a good safe regulated intelligent charger is important. I know tons of people seen side effects from this and just think its a junk battery when infact its from neglecting to check. There is NOTHING on an alternator that will tell you your battery is charged and when you check to see if it is you cant do it with the car on. The car needs to be off for a couple hours and measured with the car off. If you ever seen a corroded flooded non sealed battery you are witnessing this first hand. If a battery doesnt recharge in a correct fashion an alt can cause it to get hot. This is why u shouldnt allow your batteries to rest low especilly when being used in a car. If you have a low battery recharge it with the proper charger, especially if you do not know how long it might have been low.</p></blockquote><p></p>

[QUOTE="audiolife, post: 7651902, member: 541383"] Charge them with a good charger before installation depending how the battery was stored temps and resting voltage at time of storage will be a variable. When a battery discharges is sulfates and if left sulfated it can make the battery slow to recharge or not recharge at all because it can crystalize if not recharged. If an alternator gets a low sulfated battery it can cause it to go thermal and ruin the battery. This is why having a good safe regulated intelligent charger is important. I know tons of people seen side effects from this and just think its a junk battery when infact its from neglecting to check. There is NOTHING on an alternator that will tell you your battery is charged and when you check to see if it is you cant do it with the car on. The car needs to be off for a couple hours and measured with the car off. If you ever seen a corroded flooded non sealed battery you are witnessing this first hand. If a battery doesnt recharge in a correct fashion an alt can cause it to get hot. This is why u shouldnt allow your batteries to rest low especilly when being used in a car. If you have a low battery recharge it with the proper charger, especially if you do not know how long it might have been low. [/QUOTE]

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