Duracell is a brand of batteries manufactured by Procter & Gamble.

Assault and battery is the combination of two violent crimes: assault (the threat of violence) and battery (physical violence). This legal distinction exists only in jurisdictions that distinguish assault as threatened violence rather than actual violence.

Joe is playing on the two meanings of ‘battery’

Brandon Jacobs was a running back for the New York Giants, but was released on on March 9, 2012

So his ‘run stopped’ as he is no longer playing running back

This is Double Entendre

His jewellery is sick (good, cool) but, ‘I got a disease on my wrist’ is taking the meaning of ‘sick’ literally (afflicted with ill health or disease; ailing)

This verse was originally used in ‘You’re Nobody (Til Somebody Kills You)’ on Biggie’s second album Life After Death

‘Show me the money’ is a well-known phrase uttered by the titular character in the 1996 movie Jerry Maguire who was played by Tom Cruise

When cell phones have no reception the blue bars on the screen disappear

Also this line starts the phone reference that continues for the next few bars

‘Don’t get it twisted like phone cords tangling up’ he means don’t get it wrong, don’t get confused about it. It’s also a double entendre taking ‘get it twisted’ literally, if the phone cords were tangled up they would be ‘twisted’

Also the next two lines continue the phone reference.

‘Pac is Taking a shot Bad Boy Records (mainly Biggie and Puffy) who he was beefing with at the time.

Some guns have a laser sight attached to the barrel for accuracy. When you see a red dot it means that, that is where the gun is pointed. So if you see red dots on you, you know what happens next

A head shot is a photographic technique where the focus of the photograph is a person’s face. Jada is using wordplay here comparing the gangsters he rolls with to photographers because when they shoot at someone they shoot for the head. Also known as a ‘headshot’