There are several bands that go by this name.
1) A downtempo Nottingham, UK duo (aka The Deadbeats), releasing since 1995, consisting of Damian Stanley & David Estella, with productions inc: Feel Good, Funky for You & Made in the Shade (on their Lounging album). They have been featured on numerous compilations, by Mr. Scruff, Nightmares on Wax & others. They are DJs originally, from the days of The Garage (Nottingham). Damian has engineered for: UMM, Warp, Junior Boys Own, Chrissie Hynde & others. Their latest album release was Made in The Shade (2009, Wax On Records Ltd.).
Official site: http://mySpace.com/theDeadbeatsAreBack
2) A late-70s LA punk band (aka The Deadbeats).
3) A USA duo, Lauren Stork & Michael Browder. They started first under the name Electrocution &, after putting out a self-released CD/EP 'Twilight Talk', then changing it to Deadbeats. Their first CD/EP 'Another Rose' was released out on Blood of the Drash Records in Sep. of 2006. Then in 2007 they moved to Portland OR., and released their second album 'Loss Of Control' that was self-released on their 'DIY' record label Recluse Records. They then soon after put out their next CD/EP '999 Ways To Die' and their first 7" split record with VV Morgue, both put out under their DIY record label Recluse Records. They have recently released their fifth release 'MOVIN' cd/ep in Dec. of 2008 on Recluse Records.
Existed from Aug. 2004-Jan. 2009 from Colubmia, South Carolina (USA) http://mySpace.com/DeadbeatsMusic
4) A North West England electronica act.
5) A Rock n' roll band from The Netherlands: ''Straight out of Brabant (NL), the Deadbeats serve up a nice dish of no-bullshit Rock 'n Roll. Infuenced by classic bands such as Motorhead, Ramones and the MC5, but also inspired by modern classics such as the Hellacopters, Zeke and the Dwarves''
6) A Grateful Dead cover band from Albany, NY.
7) A funk/jazz hip-hop group from Hawaii.