Okay so I bought my 13" Macbook Pro from a friend in October. It's a late 2011 model. Last night I got it out and it wouldn't turn on. I figured the battery had died because I hadn't had it plugged in. So I plugged it in and it turned on. The battery now has an "x" over it. I've read some different things on here and I checked the status of my battery.
Serial Number: 9G14803AZD3NB
Device Name: bq20z451
Pack Lot Code: 0
PCB Lot Code: 0
Firmware Version: 201
Hardware Revision: 2
Cell Revision: 164
Charge Remaining (mAh): 0
Fully Charged: No
Full Charge Capacity (mAh): 0
Cycle Count: 0
Battery Installed: No
Amperage (mA): 0
Voltage (mV): 0
I checked my battery also by hitting "alt" and clicking on my battery icon and it says that it's condition is "normal" but there's "no battery available."
What do ya'll think?
I found the following information that should help you resolve the issue:
Once you have fully drained the battery, when you plug in the MacBook, MacBook Air, or MacBook Pro's power cord and start the computer up, you may see an X over the battery icon in the menu bar. If you see this, allow the battery up to five minutes to come out of its low power mode and begin accepting a charge again. If your battery still is not recognized by the computer—if it still has an X over the icon—after five minutes, you may want to reseat the battery on your MacBook or MacBook Pro (applicable only to models with removable batteries). If the battery still isn't recognized after reseating, try resetting the SMC. If the battery is not recognized after those steps please contact AppleCarefor further assistance.
Your friend didnt treat the battery very well and prematurely 'ended' its life.
Contact Apple for an appt. for free in shop full diagnostic and likely battery replacement.
Bad discharging or battery use conditions:
Heat (due to environmental conditions or due to rapid discharges from heavy use = gaming / video editing)
Rapid discharging of the battery frequently causes chemical changes over time in the battery leading to decreased capacity and resistance of current flow.
The very worst use of your battery is often draining the battery very low, and worse still letting it remain in such a state.
*Most long-term rapid damage to the battery occurs from discharging it with high loading (gaming) conditions but paramount is avoiding deep and frequent low DOD (depths of discharge) in use.
Undesirable charging or charged conditions:
High perpetual SOC (state of charge), where the battery is always or very often connected to charge
Parasitic loading where the battery is both usually on and charging or worse both always charging and in sleep mode, since this induces mini-cycling of the battery.
Bad general handling conditions:
Temperature use conditions when either too hot (95F and above) or too cold (50F and below)
Storing your battery away with a low charge (40% and less) long-term.
Your battery is subject to chemical aging even if not in use. A Lithium battery is aging as soon as its made, regardless.
In a perfect (although impractical) situation, your lithium battery is best idealized swinging back and forth between 25 and 85% SOC (state of charge) roughly.
Further still how you discharge the battery is far more important than how it is either charged or stored short term.
Ultimately counting charge cycles is of little to no importance. Abuse in discharging (foremost), charging, and storing the battery and how it affects battery chemistry is important and not the ‘odometer’ reading, or cycle counts on the battery.
Everything boils down to battery chemistry long term, and not an arbitrary number, or cycle count.
Keep your macbook plugged in when near a socket since in the near end of long-term life, this is beneficial to the battery.