Rebreather World - View Single Post - NiMH Battery Packs (rechargable) for Mark-15's

Skipbreather · 7th May 2008, 13:09

Quote: (Originally Posted by Dave Sutton)

If I managed to get rechargable NiMH battery packs and chargers made for the 18-cell Mark-15 pods, who would want them? Cost is <absolutely no clue> but for the well heeled Mark-15 diver, a pair of these and a charger would save loads of soldering.
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Hi Dave-

Been there, done that. My electronics were S-J first gen digitals-feeding the power sucking original solenoid- that ran on the original +12V/center tap/-12V packs. Problem I had to deal with: NiMH is a nominal 1.2 V cell vs. 1.5 V for alkaline. That dictated 22 cells, not 18 and 22 AAs just couldn’t be crammed into my pod. Solution was to drop down to AAA cells- the best I could find. That was 800 mah at the time, but 1000 mah is the norm these days. Worked great!

Simple “intelligent” chargers can be had these days for under $40, and 1000 mah AAA NiMH cells can be had for as little as $1.04 each in suitable quantity Ni-MH Batteries - AAA Size Series Batteries . Molex bits- or however you connect- from DigiKey would bring parts in at under $100.

Ken

7th May 2008, 13:09	#6 (permalink)
Skipbreather Reads the fine print Current Rebreather/s: Megalodon Home Build Other Rebreather/s: Not Bought Yet MK 15.X Home Build Join Date: Mar 2005 Location: Chicago, Illinois, USA Posts: 555	Re: NiMH Battery Packs (rechargable) for Mark-15's Quote: (Originally Posted by Dave Sutton) If I managed to get rechargable NiMH battery packs and chargers made for the 18-cell Mark-15 pods, who would want them? Cost is <absolutely no clue> but for the well heeled Mark-15 diver, a pair of these and a charger would save loads of soldering. . Hi Dave- Been there, done that. My electronics were S-J first gen digitals-feeding the power sucking original solenoid- that ran on the original +12V/center tap/-12V packs. Problem I had to deal with: NiMH is a nominal 1.2 V cell vs. 1.5 V for alkaline. That dictated 22 cells, not 18 and 22 AAs just couldn’t be crammed into my pod. Solution was to drop down to AAA cells- the best I could find. That was 800 mah at the time, but 1000 mah is the norm these days. Worked great! Simple “intelligent” chargers can be had these days for under $40, and 1000 mah AAA NiMH cells can be had for as little as $1.04 each in suitable quantity Ni-MH Batteries - AAA Size Series Batteries . Molex bits- or however you connect- from DigiKey would bring parts in at under $100. Ken __________________ "Entropy RULES! Enjoy the interim."
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