HP Xpander Batteries


My HP Xpander's batteries no longer hold charge. I opened the battery compartment and I see that the unit is powered by two rechargeable AA NiCad batteries. There is a warning on the batteries, as well as the manual that the batteries are not to be replaced by the user and there is a danger of explosion (!) if incorrect batteries are fitted. Further, there is room for a flat CR2032-like battery, but there is no battery there.

Does anyone know if this scary warning is true, as the batteries seem pretty straightforward to me. Also, does anyone know what type of battery is the extra (most likely backup) battery?


They were just concerned that you might use something other than NiCd cells. Should be no problem if you use those. Even NiMH would probably be OK, but don't use alkalines!

I wouldn't install the lithium cell; if they didn't provide one, it's possible that the circuitry for it doesn't work or wasn't production qualified.


I've used alkaline cells in Xpander--worked fine. But for goodness sake don't try to recharge them! Just discard and replace.

The Xpander will also work with no batteries on wall power, but this may not be a best practice if there is a surge depending on the power supply inside.

It is a bit tricky to insert batteries with the stiff spring contacts at each end. I use the corner of a credit card as a shim to keep the spring straight while putting in the battery.

As you will note, there are no electrical contacts for the coin cell compartment. This had not been implemented in the pre-prod model, I believe.


Thank you both for the information. I now (!) see that there are no contacts in the coin cell compartment. I think it's safer to use rechargeable ones.


I have had good luck with a national chain called "Batteries Plus". They have many types of rechargables, but the best part is they have the spot welder to link them together (those little metal straps). They have been inexpensive, and if you talk the talk they will work fast! Bill


Batteries Plus. Good to know Bill. Thanks! (It's amazing how many batteries one person needs...)

Possibly Related Threads...
Thread Author Replies Views Last Post
  HP 50g : More on best rechargeable batteries Miguel Toro 1 612 12-12-2013, 05:31 PM
Last Post: David Hayden
  HP 50g : Best rechargeable batteries ? Miguel Toro 14 1,290 11-16-2013, 03:35 PM
Last Post: Dieter
  Storing HP-42S without batteries Yriarte 4 636 10-19-2013, 08:32 PM
Last Post: walter b
  HP-12C batteries Yriarte 4 628 10-12-2013, 10:39 PM
Last Post: Yriarte
  BATTERIES' SWAP ON HP 48GX aurelio 7 897 10-06-2013, 07:50 PM
Last Post: aurelio
  HP Xpander. A good idea that could've worked? Matt Agajanian 1 316 05-24-2012, 05:01 PM
Last Post: Luiz C. Vieira (Brazil)
  HP-67 won't run on batteries David Ramsey 5 642 04-18-2012, 12:15 AM
Last Post: David Ramsey
  N batteries for HP 41's WaltMaken 17 1,429 01-13-2012, 01:08 AM
Last Post: Håkan Thörngren
  HP-15c LE Batteries Michel Beaulieu 2 408 09-02-2011, 03:13 PM
Last Post: Kiyoshi Akima
  Xpander Geoff Quickfall 3 386 07-25-2011, 03:09 AM
Last Post: Arnaud Amiel

Forum Jump: