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The BMW Range
5 Series
E39
Voltage stabilizer
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<blockquote data-quote="jarance" data-source="post: 384222" data-attributes="member: 21"><p>I need help and advise. I changed my E39 battery back in 14/12/2007, battery is original BMW battery. Today, the battery just died. When I used a volt meter to measure, it was only 10.8V. Couldn't start the car at all. Battery is less than 2 years old when it should at least last for 4years. I suspect over charging though I haven't tested it before, just a guess. Mileage of car is 199989km, M54B22, 2003 model.</p><p></p><p>Question here is</p><p>1) What is the voltage supply when car is running? Will it be more than 14.5V and more?</p><p><span style="color: Blue">Bro, should be 14.5V. The regulator in the alternator will limit the voltage output.</span></p><p></p><p>2) Can I add a voltage stabilizer at the battery to stabilize the voltage?</p><p><span style="color: Blue">It might help but I doubt it.</span></p><p></p><p>3) Anyone added voltage stabilizer to your E39 before?</p><p><span style="color: Blue">I have never add any VS in my car. Usually I clean the earth/ground contact.</span></p><p></p><p>4) What's current cost of battery?</p><p><span style="color: Blue">Search for delco. I think it depend on the AH and DIN size. </span></p><p><span style="color: Blue">before you change the battery, the battery shop should have a device to check the condition of the battery. Sometime the battery cannot charge if the electrolyte level is low.</span></p></blockquote><p></p>
[QUOTE="jarance, post: 384222, member: 21"] I need help and advise. I changed my E39 battery back in 14/12/2007, battery is original BMW battery. Today, the battery just died. When I used a volt meter to measure, it was only 10.8V. Couldn't start the car at all. Battery is less than 2 years old when it should at least last for 4years. I suspect over charging though I haven't tested it before, just a guess. Mileage of car is 199989km, M54B22, 2003 model. Question here is 1) What is the voltage supply when car is running? Will it be more than 14.5V and more? [COLOR="Blue"]Bro, should be 14.5V. The regulator in the alternator will limit the voltage output.[/COLOR] 2) Can I add a voltage stabilizer at the battery to stabilize the voltage? [COLOR="Blue"]It might help but I doubt it.[/COLOR] 3) Anyone added voltage stabilizer to your E39 before? [COLOR="Blue"]I have never add any VS in my car. Usually I clean the earth/ground contact.[/COLOR] 4) What's current cost of battery? [COLOR="Blue"]Search for delco. I think it depend on the AH and DIN size. before you change the battery, the battery shop should have a device to check the condition of the battery. Sometime the battery cannot charge if the electrolyte level is low.[/COLOR] [/QUOTE]
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The BMW Range
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Voltage stabilizer
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