Features: This auction battery pack replaces the original HP battery pack serial numbers HP 82109A. This battery pack is rated at: 3000 maH, 2.4 volts, NiMH, 2-cell construction and rechargeable. Same size as the original battery pack. Each battery pack fits into the calculator case perfectly. Same connector geometry as the original battery packs. Will outperform the original HP battery pack rated at 450 maH. Each battery pack is free-replacement guaranteed for 30 days.
Recharging: Your HP adapter will recharge the battery pack many times. A fully charged battery pack should last for about 10 hours of continuous use. The HP adapter/charger will recharge the battery pack faster if you turn off the display, yet will also charge it with the display on. These batteries will completely recharge through your plugged in HP adapter in about 6 hours, depending on the prior calculator usage.
Battery Storage: Please protect your beautiful HP calculator! All new rechargeable battery packs will eventually leak a corrosive acid that may harm your calculator. However, as a precaution, write on the label the purchase date plus three years after installing it for the first time. Conservatively replace after three years (should last much longer). If you are not using the calculator for a long time, please consider removing the battery and place it in a sealed plastic bag. These devices are just too awesome to risk any potential damage.
Consider buying my Spice USB adapter charger with Auto-off circuit. When the battery pack is recharged fully the adapter shuts off the charging current.
Shipping: Shipping costs are listed below. For multiple battery pack purchases contact me for actual shipping costs. I will refund your extra shipping charges and only charge you actual shipping costs. BTW, 93.9% of my sales are mailed in one day.
Also check my other HP calculator battery packs for sale especially the HPClassic HP-35, 45, 55, 65, 67 calculators and for the larger HP-Topcat HP 95-97 calculators. Waterhosko is also advertised on the HP Calculator Museum website.
Hope to add you to my list of satisfied customers.
Sincerely, Mark Hoskins