Premium Series MA561LL/A by APPLE Type: Battery Battery Type: 6 Cell Lithium-Ion Battery Voltage: 10.8V Battery Capacity: 55WhPremium Series Ma561ll/a By Apple available on July 11 2016 from NeweggBusiness for itemprop="offers" target="_external" title="" itemscope itemtype="http://schema.org/Offer">113.85