cells

  1. G

    Question about discharging nimh cells in parallel

    Hi, I have question about paralallel discharging NiMH modules. I have 40 modules and one modul consist of 6 x 1.2V cell = So nominal capacity is 7.2V. These modules are in car connected in series. But I replaced 15 bad cells and now I need balance them. In one thread I have got good advices but...
  2. G

    Parallel nimh cells connection

    Hello I have question about connect to 40 nimh cells with 8.4 - 8.7 Volts parallel. I need balance whole battery pack for hybrid car. Is it safe to connect 40 cells parallel and wait? Every cell has more than 5000mAh capacity, but I need the same voltage. One more question is if I can discharge...
  3. S

    Solar Cells For Greener And Safer Energies

    Researchers report on low-temperature, solution-processed, environmentally friendly inorganic solar cells made with Earth-abundant materials capable of operating with a power conversion of 6.3 percent. Continue reading...
  4. S

    Advances in photovoltaic technology

    We were hoping to get a solar installation done by now, but we ran out of money. While we continue to save up, I read today that solar panel costs could significantly come down. Breakthrough in solar panel manufacture promises cheap energy within a decade - Science - News - The Independent But...
  5. V

    replacement Bosch 36v batteries

    Ive used Bosch power tools for years without problems, However both batteries on my Bosch 36v SDS have failed within weeks of each other and the drill is just out of warranty. One battery wont hold any charge, one will only hold enough for two rawlplugs There seems to be several option, the...
  6. Rockingit

    Anyone tried to repair / replace cells in Bosch 10.8 L-ion?

    Got one that's not very happy - claims to be full when it isn't - and a quick look suggests the pack will pop open and can probably replace whatever the cells are straight off the RS shelf. Anyone tried this before? [have posted this here and not tools as it's equally an electrics issue!]
  7. E

    Servant call bell/box

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  8. O

    Locked cells on Excel spreadsheet

    This is great. My son was set some homework and it was on an excel spreadsheet. Out of the 20 questions one of the "locked" cells has the incorrect format so its impossible to "display" the correct answer. At parents evening last night I asked his teacher about this and she admitted that they...
  9. M

    Megger 1720, rechargeable or not, that is the question??

    Hi all got a megger 1720, tried using it with rechargeable batteries, 2450 mah duracell type and they seem to last not very long, bout a week of constant testing, however using duracells alkaline batteries pro-cell type they last for about 3 weeks, is this normal.....anybody else tried this and...
  10. R

    Battery 18V de walt lith ion battery question?

    Hi guys I've got 2 de Walt batteries as explained in the title. One of them is older than the other (3 years) It will not charge. When I put in charger the red light flashes faster than normal and doesn't charge. Anyone experienced this before? Is the battery stuffed? I would have thought the...
  11. P

    shaded panels weird effect.

    In the cold mornings as the sun rises, there is condensation on my panels. I noticed a weird effect on my shaded panel and took a pic. Is this as expected?
  12. R

    Scratches on PV Panels

    Hi, Just had 16 PV panels fitted last week and all seemed to go well, but have just noticed a few of the panels have quite long scratches (see images) on the top of them (scaffolding is still up, so I went up for a look)! I can really only see the bottom row of panels and 3 out of these 8 are...
  13. E

    Advice on company who wants to lease roof to fit PV cells

    :smilewinkgrin: Hi, A relative of mine has been asked by a company to lease the roof to them to fit PV cells. I was wondering if it would be worth while, they are out all day, so not much power used ,which would mean the company would be able to claim the tarrif for supplying power into the...

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