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| 9v battery replacement circuit for Fluke 70 series and others |
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| iJoseph2:
--- Quote from: robert.rozee ---i agree 100%. tell me where i can get 3S LiFePO4 PP3 batteries from, and i will be most happy to use them. unfortunately, they do not seem to be something that is available. while there are 9v PP3 batteries around that contain a single cell and internal booster, these have pretty awful self-discharge issues. and a 2S LiIon PP3 battery has issues with low terminal voltage. --- End quote --- I considered the Energizer Lithium 9v batteries but I wasn't sure if the open circuit voltage was safe for the meters. The soshine li-ion batteries I got looked like the open circuit voltage was lower than alkaline so that's what I picked instead. (be aware that there is a 3cell soshine battery so be careful which one you use). |
| wasedadoc:
No argument that alkaline AA and AAA leak but I've never see the 9 volt 6LF22 size do it. Even the two I bought more than 20 years ago. Tesco (UK supermarket) branded and marked 10 2009. Were originally bought for use in microphone transmitter and camcorder receiver when making a wedding video. Then unused until 3 or 4 years ago when I put them in a couple of those $10 LCR transistor tester thingies. Had a look just now and no sign of leaking. Voltage is well down but still enough to power the testers. I have others in multimeters and security alarm control box etc. Never seen any leakage. As an aside a few weeks ago I wanted another for a newly acquired ESR meter. Last ones I bought came from Poundland at £1 each because they were cheaper than Lidl. But neither store currently has any. Not even a labelled empty space for them. Is there a world shortage of those batteries or are they so little used now in comparison to AAs and AAAs that those shops have decided not to stock them? |
| iJoseph2:
--- Quote from: wasedadoc on November 28, 2022, 03:43:03 pm ---As an aside a few weeks ago I wanted another for a newly acquired ESR meter. Last ones I bought came from Poundland at £1 each because they were cheaper than Lidl. But neither store currently has any. Not even a labelled empty space for them. Is there a world shortage of those batteries or are they so little used now in comparison to AAs and AAAs that those shops have decided not to stock them? --- End quote --- If I absolutely must use alkalines (such as smoke alarms) I only get GP Ultra/GP Super from toolstation .. https://www.toolstation.com/gp-ultra-alkaline-battery/p37780 £8.99 for a 4pack They seem to have one pack in stock in all the stores near a couple of locations I just tried and 20 for delivery. |
| BeBuLamar:
--- Quote from: robert.rozee on November 28, 2022, 02:28:31 pm --- --- Quote from: BeBuLamar on November 27, 2022, 06:02:47 pm ---They may leak but I can get the battery manufacturer to buy me new meter. --- End quote --- you must be living in a different reality to me. cheers, rob :-) --- End quote --- All thre popular brands of batteries Duracell, Energizer and Rayovac will replace your meter if their batteries leak and damage your meter |
| Black Phoenix:
--- Quote from: BeBuLamar on November 28, 2022, 07:20:10 pm --- --- Quote from: robert.rozee on November 28, 2022, 02:28:31 pm --- --- Quote from: BeBuLamar on November 27, 2022, 06:02:47 pm ---They may leak but I can get the battery manufacturer to buy me new meter. --- End quote --- you must be living in a different reality to me. cheers, rob :-) --- End quote --- All thre popular brands of batteries Duracell, Energizer and Rayovac will replace your meter if their batteries leak and damage your meter --- End quote --- Yeah right, still waiting for Duracell to replace my 54ll. I'm currently in 8 years and still waiting... They basically ask me to pow sand, but they offer a replacement for the batteries who leaked, so a pack of 4 Duracell. |
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