When the available battery time is shortened considerably, a probable cause of this is that the battery has reached the end of its life.
The battery life will vary according to how it is stored and through general operating conditions.
This replacement battery will extend the life of your pda,

Suitable for:

•   Alltel,  PPC6700,
  
• Audiovox,  PPC6700, PPC-6700, VX6700, VX-6700,
  
• Cingular,  6500, 8525,
  
• DOPOD, 838 Pro, 9000, CHT9000,
  
• HTC, Apache, Hermes, Hermes 100, Hermes 160,  Hermes 200, P4500, TyTn,
  
• i-mate,  JASJAM,NTT,  DoCoMo hTc Z, 
  
• O2,  XDA Trion,
• Orange,  SPV M3100, 
  
• Qtek,  9600, SoftBank,  X01HT,
  
• Sprint,  PPC-6700,
  
• Swisscom,  XPA v1605,
  
• T-Mobile, MDA vario II, 
  
• UTStarcom,  6700, PPC-6700, VX6700, Verizon,  XV6700, 
  
• Vodafone,  v1605, VPA Compact III, Wireless PDA 1605,
• 35H00060-00M,  35H00060-01M, 35H00060-04M, BA S100, BTR6700, BTR6700B, HERM160 HERM161, HERM300,