duracell ultra ,what is high drain level 500ma or 1 amp &higher

[qip]

checking some battery options D alkaline sized, i see duracell ultras m3 recommended for high drain, now what is high drain to them , would a maglite @4-500ma be better off with ultras or regular coppertops? same question for 900ma

 

[InfidelCastro]

Maglite, even with stock krypton bulb, is gonna draw alot more than 500mA unless you're running some really weak, off-brand bulb in it.

 

[abvidledUK]

Check out Duracell Data sheets.....google

 

[65535]

alkalines don't really give a number I clocked 7 amps dead shorting a AA alky.

 

[bfg9000]

All alkalines are close enough in performance that it's usually OK to buy only by price. Paying double for "premium" alkalines can get you single-digit increases in performance, so it's not like with AA where paying 4x as much for lithiums can get you 4x the performance (more convenience, longer storage, and a flat discharge curve to boot). IKEA and Rite Aid are frequently available at good prices; haven't seen any Kirkland Signature D cells.

Most D-cell bulbs are ~0.75 to 0.85A because an alkaline D that lasts 14.5 hours at 0.5A only lasts 10 minutes to 1.0v at 3.0A...

 

[RoyJ]

Most D-cell bulbs are ~0.75 to 0.85A because an alkaline D that lasts 14.5 hours at 0.5A only lasts 10 minutes to 1.0v at 3.0A...

Sounds about right. My 6D Mag bulb at 10.5V pulls about 1amp. Assuming roughly 10 ohms, that's .72A at rated voltage of 7.2V.

Off-brand bulbs are a little lower, especially at higher voltages. Most 6D bulbs are rated at .55 amp.

 

[bfg9000]

Before LEDs, it was popular to use AA bulbs in D-cell lights to get the most out of alkalines. Slightly dimmer, but offset by the whiter light of the slightly overdriven bulbs, and yet not overdriven enough to shorten bulb life to intolerable levels (the flashaholic is of course willing to pay the price for overdriving by one whole cell).

KPR 104 2.2v 0.47A 7.0L 15Hr 2AA-cell

KPR K1 2.4v 0.5A 11.0L 6Hr

KPR 101 2.4v 0.52A 11.0L 10Hr

KPR 102 2.4v 0.7A 16.5L 15Hr 2C-cell

KPR 807 2.4v 0.715A 14.0L 50Hr

KPR K2 2.4v 0.83A 20.61L 5Hr 2D-cell

KPR 131 2.4v 0.835A 18.5L 15Hr 2D-cell

SKPR 803 2.4v 0.92A 22.5L 10Hr Rechargeable

KPR 801 2.4v 1.2A 29.5L 10Hr Rechargeable

KPR 805 2.8v 0.95A 25.0L 50Hr Rechargeable

KPR 106 3.6v 0.3A 11.0L 10Hr 3AA-cell

KPR 103 3.6v 0.75A 34.0L 20Hr 3C-cell

KPR 5984 4.0v 1.0A 47.0L 200Hr Rechargeable

KPR 1941 4.75v 0.5A 35.0L 10Hr 4AA-cell

KPR 802 4.8v 0.5A 33.0L 15Hr

KPR 113 4.8v 0.75A 51.0L 20Hr 4C-cell

KPR 813 4.8v 0.93A 80.0L 5Hr 4D-cell

SKPR 823 4.8v 1.1A 84.0L 10Hr Rechargeable

KPR 825 5.2v 0.25A 12.0L 20Hr

KPR 826 5.2v 0.4A 30.0L 30Hr

KPR 112 6.0v 0.75A 75.0L 20Hr 5C-cell

KPR 6C 7.2v 0.66A 71.0L 36Hr 6C-cell

KPR 118 7.2v 0.75A 100.0L 15Hr 6D-cell

Halogen and xenon equivalents tend to have slightly higher current draw.