1. 
   Hbt
   Household batteries.
   Found op http://grn.com/library/gloss.htm
   
   
2. 
   HBT
   HBT is a three-letter initialism that can mean: ...
   Found op http://en.wikipedia.org/wiki/HBT
   
   
3. 
   HBT
   [explosive] 5,5`-Hydrazinebistetrazole | Section1 = {Chembox Identifiers | CASNo_Ref = {{cascite|correct|??} | CASNo = 74999-19-2 | PubChem = 144703 | PubChem_Ref = {Pubchemcite|correct|pubchem} | ChemSpiderID = 127666 | ChemSpiderID_Ref = {chemspidercite|changed|chemspider} | SMILES = N(Nc1...
   Found op http://en.wikipedia.org/wiki/HBT_(explosive)
   
   
4. 
   hbt
   1) Household batteries
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/hbt/1
   
   

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