bat_drain: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On CentOS possible default full paths are:

/usr/lib64/bltk/bin/bat_drain - from package: bltk

You may install the required package with command yum install {package}

Error in other languages:
bat_drain: bevel nie gevind nie
bat_drain: comandă negăsită
bat_drain: comando não encontrado
bat_drain: commande introuvable
bat_drain: command not found
bat_drain: käsku ei ole
bat_drain: không tìm thấy lệnh
bat_drain: komanda nerasta
bat_drain: Kommando nicht gefunden.
bat_drain: kommandot finns inte
bat_drain: komut yok
bat_drain: nie znaleziono polecenia
bat_drain: níor aimsíodh an t-ordú
bat_drain: no se encontró la orden
bat_drain: no s'ha trobat l'ordre
bat_drain: opdracht niet gevonden
bat_drain: parancs nem található
bat_drain: perintah tidak ditemukan
bat_drain: príkaz nenájdený
bat_drain: příkaz nenalezen
bat_drain: команда не найдена
bat_drain: командата не е открита
bat_drain: 命令找不到
bat_drain: コマンドが見つかりません