first of all: OTK decks are hated by many people, after all they dont really give fun to both parties its just fun for the person running them...
if your cruel youll say this: WHO CARES? AS LONG AS I HAVE FUN!
if you good youll say this: many people do this to me.. so im following a
saying: If You Can't Beat Them, Join 'em!
the angelic person's say this: i dont want to make an OTK deck
secretprinceidentity.. has a point!
Now now... dont be sad.. after all, we always choose to be a good person right? (even me will choose the good's persons answer)
now if you really want to have an OTK deck...
(get ready to be hated by people.. JOKE!)
(now enough with the cheesy and corny jokes
lets be serious shall we?)
Your first question was: Is battery man a competetive OTK deck?
Ill answer it by saying.. Yes it is competetive... for me competetive Otk decks
are decks that can stand on their own even when the Otk is not succesfull.. and batteryman (i think) is one of them..
But..
some more other decks are better and much mor competetive than batteryman.... these are:
Zombie OTK (ill explain this later)
Gaia OTK (its actually basic and easy so no need to explain)
Blackwing w/ Vayu OTK (search this on google its very popular these days)
now the Zombie Otk..
this OTK deck can stand on its own.. and makes opponents cry...
this zombie OTK is different than what you think.. i think i'd rather call it zombie loop than zombie otk..
explanation:
(note this explanation is not mine i copied it from a random site and it was made by a great guy with a name of -Scorpion67- )
I did a lot of test right now with many poeple and i can see that a lot of people are interested in zombies but dont know how to run them so i made this topic to show the zombies OTK featuring BRIONAC
its easy when u know how to do it but for peoples who dont know how it works here is the combo for Zombie diva
You need a face up Goblin Zombie on the field and you Normal Summon a Deep Sea Diva. You special summon another Deep Sea Diva from your deck. You then perform a synchro summon with Goblin Zombie and Deep Sea Diva for a Brionac, Dragon of the Ice Barrier. You search a Mezuki from your deck using Goblin Zombie's effect. You discard Mezuki and/or any number of cards to return cards on the field to the Hand. You then remove Mezuki to special summon Goblin Zombie and repeat but synchro summoning another LV6 like Goyo Guardian.Another route you could go is summon Deep Sea Diva and fetch another one while goblin zombie is on the field. synchro and fetch a card for advantage, then synchro again for a level 8 like Stardust Dragon or Red Dragon Archfiend. Burial from a Different Dimension helps speed up this deck because it returns your Mezuki, Plaguespreader Zombie, Goblin Zombie.
for those who dont run deep sea diva in their decks, plague spreader zombie is the other variant for this combo
u will need a face up goblin zombie and sumon plague spreader zombie to synchro Brionac. use goblin eff to search for mezuki. use brionac effect diacarding mezuki to return an opponent card to his hand and activate mezuki effect to bring back goblin zombie to the field. use book of life or another card that can special sumon plague spreader zombie from the graveyard and synchro plague spreader and goblin zombie into a goyo and search for mezuki with goblin zombie eff. discard mezuki with brionac effect and use mezuki effect to bring goblin zombie back on the field. use plague spreader zombie effect returning one card in the top of ur deck and synchro for another card like gaia the force of earth. right there u have Brionac - Goyo - Gaia = 2300 + 2800 + 2600 = 7700 what is almost an otk in the 1st turn
this deck goes good with burial from another dimension and necro gardna can be a help too, ryko can help to mill, and don't forget zombie master he can return plg zombie the same turn he is discarded, because zombie master can bring back the monster that was used as a cost too. Spirit reaper can help to stall.
now make the zombie deck then show it to me..
i gotta catch some zzz's so goodnight!
Hope This Helps again...!