Devilman Battler (デビルマン戦団) is a manga by Inoue Daisuke. The manga has not been collected in any standalone books and is possibility incomplete.
The human form of Li Tachibana and the devilman form of Kanzaki Saweko in Devilman Grimoire are taken from characters in Battler.
The word 戦団 in the title is usually pronounced sendan and means "Battle Group" or "Fighting Force", but is given the reading バトラー (batorā, battler). The reading is intended as an English translation of sendan, but is in the wrong grammatical number.