Battery replacement 8.5 Wh instead of 9.5 Wh MacBook Pro 17 won't boot

Usually a new battery should be charged until full to capacity before starting the

computer from it; the indicator lights on the battery are adequate for that purpose.

Batteries such as these may have 50+ watt/hr and up, depending on maker and

purpose they are intended. Third-party makers offer larger storage capacity.

With a fully charged battery, then one may see about calibration of the battery so

the gauge may be accurate (there is a chip in the battery, too) and the SMC may

also need to be reset so the power and charging system can work correctly.

To reset the System Management Controller, may be of some help. Some users

also reset the NVRAM but that may have little effect; read through both anyway.

•Intel-based Macs: Resetting the System Management Controller (SMC)

•About NVRAM and PRAM

•Apple Portables: Calibrating your computer's battery for best performance

{Newer models w/ built-in batteries need not have them 'calibrated' anymore.}

The newest portable Apple products use different technology than the older ones.

http://www.apple.com/batteries/

The amp/hours or Watt/hours of battery nomenclature refers to capacity, so once

charged up they may have that number as a reserve. A larger capacity battery

may also take longer to charge fully; so on initial use it would not be impossible for

the cell to take up to 6 hours or so, maybe more.

•Apple Portables: Troubleshooting MagSafe adapters

Some battery sellers offer an external charger for certain models of battery so it

may be possible to charge up a battery outside of the computer; handy if one

should have an issue with the internal charging circuit or if you had two batteries

that were requiring a charge. Or a shared re-charging area for several users of

a similar specification battery, where a user can swap them out directly.

An example of source for external charger, replacement battery, & other parts:

http://eshop.macsales.com/shop/powerbook-ibook-macbook/

Anyway, I am not certain what the issue in your situation actually is; sometimes

there could be some other hardware or software matter; to include a weak new

battery. Charging before initial use is recommended no matter the brand.

Good luck & happy computing! 🙂

Ros12qwe,

a watt·hour is a unit of energy; it represents the battery’s charge capacity (which is usually measured in mA·h, millampere·hours) at a given voltage. For your 17-inch Mid 2009 MacBook Pro, I believe that its original battery was rated for 12,820 mA·h at 7.3 V. Since your new battery can’t hold as much energy as your original battery did, it doesn’t seem to be an exact replacement. Does your new battery require being charged for some number of hours before being used for the first time, even if the charge reaches 100% before that number of hours passes? (Some batteries require that initial “conditioning” before being used for the first time.)

The suggestion to try the Calibration as mentioned in the Support link above may be helpful

should the battery gauge show the power levels to be incorrect; which also affects charging.

Those posted links to more information sources can be considered a resource worthy of study.

Even though models with Built-in Battery may not need Calibration. There may be an error in

Battery Gauge, so perhaps it was not fully charged when it said 100%. I'd run it on AC Power

awhile even if it says 100% charged; as it can still be charging for some time after it says that.

IF your computer model is as represented by the information you provided, it should be

a MacBook Pro 5.2 build model. However this suggests the battery would be under a

protective cover with screws holding it in, and not one that is easily removed by a coin

or simple retainer. So if this IS your model please confirm...

The battery/power specs for your MacBookPro5.2, (17-inch, Mid 2009)

Model A1297, EMC 2329, Order MC226LL/A {specs per http://mactracker.ca}

System Battery Built-in 95-watt-hour lithium-polymer

Battery Life Up to 8 hours

Maximum Battery Cycles 1000

Backup Battery --

Power Adapter 85W MagSafe Power Adapter (MA938LL/A)

More Info as seen from 'About this Mac' beneath the Apple menu bar icon, would be a

place to look into battery specs, power, and the charge characteristic of your MB/Pro.

If you are within practical proximity of an Apple Store with Genius bar, that would be well

worth the effort to contact them for an appointment for a genius to check the computer

for you, generally at no charge for a diagnostic test, to see what's up & to get advice.

http://www.apple.com/retail/geniusbar/

However if you do not have a Genius at an Apple Store, you could ask an Authorized

Apple Service Provider about the issues, and they can provide services, tests, repairs.

For additional services, info, and contacts, see these:

• Find an Apple Authorized Service Provider
• Visit an Apple Retail Store

Contact Apple Support:

http://www.apple.com/support/contact/

Hopefully this helps somewhat.

Good luck & happy computing! 🙂

edited 2x

Ross,

there’s at least one third-party source of MacBook Pro batteries which recommends an initial charge time of 12 hours with their new batteries before using them for the first time. You might wish to check with the manufacturer of your new battery to see what the recommended procedure for their batteries is.

You have nothing to fear from resetting your MacBook Pro’s SMC.

The links provided in my earlier reply are mostly from Apple Support

and as such generally have a no-damage basis, per the re-sets for

system management, and other battery information.

The OWC page also lists a fair brand of replacement with a warranty;

they ship almost anywhere and may be a better choice from third-party

branding, with consistency sometimes missing in lesser quality makers.

The SMC page cites more than just the re-set of the controller, the action

suggested would also help to troubleshoot a few issues that may not

require the SMC to resolve.

There are a few instances where the system management controller, or

power management unit, or similar circuit need be re-set. Among my Macs

(across more than a dozen years, over 250 Macs) some were more or

and others less trouble. However as hardware & systems move ahead

some of the lessons learned do not readily translate!

{Been awhile since I was last in western Canada (by road) or out of the

State of AK by plane. Almost 19 years since my last trip outside...}

Good luck & happy computing! 🙂