Can anyone recommend a brand of rechargeables that will actually fit in the HPS10?
I’ve tried Maplin’s own and Energizer but trying different brands is just too expensive for trial and error.
Thanks,
Chris
You need to target the lower capacity cells, those less than 2000mAh. This is due in part to the dimension specifications for AA cells–they are as follows:
[color=#0000BF]alkaline cells[/color]
[ul]
len: 50.0mm +/- 0.5mm (49.5mm to 50.5mm)
dia: 14.0mm +/- 0.5mm (13.5mm to 14.5mm)
[/ul]
[color=#0000BF]Ni-Cad/NiMH cells[/color]
[ul]
len: 48.9mm +/- 0.6mm (48.3mm to 50.5mm)
dia: 14.1mm +/- 0.6mm (13.5mm to 14.7mm, for jacketed cells)
[/ul]
The other component is that although some of the increased capacity offered in recent years has been due to improved cell technology and manufacturing technique, some of it has come about by manufacturers pushing the cell diameter out to the limit.
Of the AA cells in my junk drawer, all the alkaline cells are less than 14.0mm dia., a couple of 1600mAh NiMH cells were 14.0mm to 14.1mm, the 2300mAh NiMH cells were 14.3mm to 14.4mm.
This is very interesting and something I clearly wasn’t aware of (nor Maplin it would seem).
Very useful info, thank you!
C.
For HPS suitable any NiMH size AA rechargeable batteries. For 5-8 pounds you can bought 12pcs 1800-2500mA/h from HK via eBAY. You will have 2 complete sets (2x5pcs) + 2pcs for spare. Take into account, the time of a charge in HPS by a current 90mA for capacity 1800mA/h will make 30 hours, and for capacity 2500mA/h - 40 hours, because rechargeable batteries request 15 hours charge time at current 10% from capacitance. For example: for capacitance 1800mA/h need charge current 180mA/h (1800x0.1=180), time for charge 15hours, if charge current 90mA, time for charge 30 hours. (1800x0.1=180/90=2x15=30).
Better use special automatic charge unit with function ΔV or intellectual charger iMAX-B6 for rechargeable batteries of higher the capacity. It will reduce time of a charge up to 3-5 hours, and relieves that of troubles.
Differences in the sizes ±0.1-0.4mm, in this case, on anything does not influence.
[quote=“AC_DC”]For HPS suitable any NiMH size AA rechargeable batteries. For 5-8 pounds you can bought 12pcs 1800-2500mA/h from HK via eBAY. You will have 2 complete sets (2x5pcs) + 2pcs for spare. Take into account, the time of a charge in HPS by a current 90mA for capacity 1800mA/h will make 30 hours, and for capacity 2500mA/h - 40 hours, because rechargeable batteries request 15 hours charge time at current 0.1 capacitance. For example: for capacitance 1800mA/h need charge current 180mA/h (1800/0.1=180), time for charge 15hours, if charge current 90mA, time for charge 30 hours. (1800/0.1=180/90=2x15=30).
Better use special automatic charge unit with function ΔV or intellectual charger iMAX-B6 for rechargeable batteries of higher the capacity. It will reduce time of a charge up to 3-5 hours, and relieves that of troubles.
Differences in the sizes ±0.1-0.4mm, in this case, on anything does not influence.[/quote]
Actually, and was discovered by the OP, the physical size of the cells is the primary constraint. Charge time is secondary consideration.
I have an HPS10 and I tried to use some rechargeable NiZn (Nickle Zinc) AA batteries. They wouldn’t fit!
NiZn is interesting technology, higher voltage than HiMH.
[quote=“AEIOU”]I have an HPS10 and I tried to use some rechargeable NiZn (Nickle Zinc) AA batteries. They wouldn’t fit!
NiZn is interesting technology, higher voltage than HiMH.[/quote]
Most newer rechargeable cells, will not fit in many older instruments due to the older equipment’s being designed/manufactured before the larger physical size specification for AA rechargeables was released. This is also in part to prevent the less sophisticated charging systems from being overloaded (or causing same), and/or creating other issues with the newer cell technologies.