Adapting cell battery to HP 41

[Artur - Brasil]

(02-26-2019 12:45 PM)cruff Wrote:  Will the step up converter handle the current load of the card reader?

Yes, easily. I did this test, although my card reader (without use for years) only returned Error or checksum error.
I tried the bar code reader too, worked fine.
I tried many cards without any loose in power.

This battery has much more power than N cells. Any way, you can connect the cell charger and help it!