Re: [M100] NEC 8201 rechargeable battery packs and BERG jacks
Thanks, everyone - if I can find a reasonably priced rechargeable pack, I might do this. Otherwise, I’ll just keep charged NiMH nearby as spares. On the 8201’s BERG serial jacks - any experiences? Perhaps these were a way to network 8201 machines together. Best wishes, Anthony On Monday, October 29, 2018, Mike Stein wrote: > You might also want to check out a set of NiZn batteries; I've mentioned > them here before but don't know if anyone ever tried them. > > They have a nominal voltage of 1.6V and solve the early shutdown > problem, usually with a capacity of 2500 to 2800 mWh (equivalent to approx. > 1500 to 1700 mAh). > > They do require a special charger though, and trickle-charging is not > recommended. > > m > > - Original Message - > *From:* Kurt McCullum > *To:* m100@lists.bitchin100.com > *Sent:* Monday, October 29, 2018 10:04 AM > *Subject:* Re: [M100] NEC 8201 rechargeable battery packs and BERG jacks > > I purchased them through eBay. But I went back this morning to see if the > seller was still selling them and they are no longer listed. They are 480 > ma cells so two banks gives 960ma. There are other sellers. Most from China > but you are looking 1/3AA batteries with tabs. Sometimes you can find them > stacked as 3 in one like I did and that saves some time. > > Kurt > > > On Sun, Oct 28, 2018, at 4:53 PM, Anthony Coghlan wrote: > > Thanks, everyone. Kurt, that looks really good. I’m not familiar with > those smaller batteries. How or where do you get them? > > Is there any simple mod (such as the added resistor near the batteries for > the M100) that allows the 8201 to charge rechargeable batteries in a > standard battery pack when plugged in? > > Best wishes, > Anthony > > > >
Re: [M100] NEC 8201 rechargeable battery packs and BERG jacks
You might also want to check out a set of NiZn batteries; I've mentioned them here before but don't know if anyone ever tried them. They have a nominal voltage of 1.6V and solve the early shutdown problem, usually with a capacity of 2500 to 2800 mWh (equivalent to approx. 1500 to 1700 mAh). They do require a special charger though, and trickle-charging is not recommended. m - Original Message - From: Kurt McCullum To: m100@lists.bitchin100.com Sent: Monday, October 29, 2018 10:04 AM Subject: Re: [M100] NEC 8201 rechargeable battery packs and BERG jacks I purchased them through eBay. But I went back this morning to see if the seller was still selling them and they are no longer listed. They are 480 ma cells so two banks gives 960ma. There are other sellers. Most from China but you are looking 1/3AA batteries with tabs. Sometimes you can find them stacked as 3 in one like I did and that saves some time. Kurt On Sun, Oct 28, 2018, at 4:53 PM, Anthony Coghlan wrote: Thanks, everyone. Kurt, that looks really good. I’m not familiar with those smaller batteries. How or where do you get them? Is there any simple mod (such as the added resistor near the batteries for the M100) that allows the 8201 to charge rechargeable batteries in a standard battery pack when plugged in? Best wishes, Anthony
Re: [M100] NEC 8201 rechargeable battery packs and BERG jacks
I purchased them through eBay. But I went back this morning to see if the seller was still selling them and they are no longer listed. They are 480 ma cells so two banks gives 960ma. There are other sellers. Most from China but you are looking 1/3AA batteries with tabs. Sometimes you can find them stacked as 3 in one like I did and that saves some time. Kurt On Sun, Oct 28, 2018, at 4:53 PM, Anthony Coghlan wrote: > Thanks, everyone. Kurt, that looks really good. I’m not familiar > with those smaller batteries. How or where do you get them?> > Is there any simple mod (such as the added resistor near the batteries > for the M100) that allows the 8201 to charge rechargeable batteries in > a standard battery pack when plugged in?> > Best wishes, > Anthony > >
Re: [M100] NEC 8201 rechargeable battery packs and BERG jacks
Thanks, everyone. Kurt, that looks really good. I’m not familiar with those smaller batteries. How or where do you get them? Is there any simple mod (such as the added resistor near the batteries for the M100) that allows the 8201 to charge rechargeable batteries in a standard battery pack when plugged in? Best wishes, Anthony On Sunday, October 28, 2018, Kurt McCullum wrote: > This is what a 10 cell battery pack looks like. > > > > On Sun, Oct 28, 2018, at 4:16 PM, Kurt McCullum wrote: > > I have refurbished 4 NEC battery packs. One I did with 4 NiCad batteries. > the other with4 NiMH. Both charge and work fine, but exhibit the problem > where the low battery light comes one after about 45 minutes even though > there are hours left in the pack. This is true of the original NiCad > batteries as well. > The other two I built up using ten 1/3 AA NiMH batteries. Basically two > banks of 5 batteries. I really like the way these work. The only problem I > have had was that on the initial charges, the low battery light never came > on and the unit just died when the batteries were too low. But after doing > three or four charge/discharge cycles, I get a low battery light when there > are about 30 minutes of change left. These are the two packs that stay in > my units almost all the time and I will probably rebuild my other 4 battery > packs this way. > > Kurt > > > >
Re: [M100] NEC 8201 rechargeable battery packs and BERG jacks
This is what a 10 cell battery pack looks like. On Sun, Oct 28, 2018, at 4:16 PM, Kurt McCullum wrote: > I have refurbished 4 NEC battery packs. One I did with 4 NiCad > batteries. the other with4 NiMH. Both charge and work fine, but > exhibit the problem where the low battery light comes one after about > 45 minutes even though there are hours left in the pack. This is true > of the original NiCad batteries as well.> The other two I built up using ten > 1/3 AA NiMH batteries. Basically > two banks of 5 batteries. I really like the way these work. The only > problem I have had was that on the initial charges, the low battery > light never came on and the unit just died when the batteries were too > low. But after doing three or four charge/discharge cycles, I get a > low battery light when there are about 30 minutes of change left. > These are the two packs that stay in my units almost all the time and > I will probably rebuild my other 4 battery packs this way.> > Kurt > >
Re: [M100] NEC 8201 rechargeable battery packs and BERG jacks
I have refurbished 4 NEC battery packs. One I did with 4 NiCad batteries. the other with4 NiMH. Both charge and work fine, but exhibit the problem where the low battery light comes one after about 45 minutes even though there are hours left in the pack. This is true of the original NiCad batteries as well.The other two I built up using ten 1/3 AA NiMH batteries. Basically two banks of 5 batteries. I really like the way these work. The only problem I have had was that on the initial charges, the low battery light never came on and the unit just died when the batteries were too low. But after doing three or four charge/discharge cycles, I get a low battery light when there are about 30 minutes of change left. These are the two packs that stay in my units almost all the time and I will probably rebuild my other 4 battery packs this way. Kurt On Sun, Oct 28, 2018, at 5:51 AM, Anthony Coghlan wrote: > Hi - hope everyone is having a good weekend. Has anyone ever used > the DuPont BERG jacks on the NEC-8201? The manual describes them as > 19,200 baud serial ports, basically. Wondering for what they might > be useful.> > Also, does anyone have experience refurbishing a rechargeable battery > pack for the 8201 with modern rechargeable batteries? Does this work > and does the battery pack still charge well from the original power > supply, despite much higher modern capacities? Is one better off just > using rechargeable batteries in a regular battery pack? Is there a > way to adapt a regular pack to charge rechargeable batteries? Thanks > - lots of questions...> > Best wishes, > Anthony > >
Re: [M100] NEC 8201 rechargeable battery packs and BERG jacks
As far as I'm aware, no NiMH manufacturer recommends trickle-charging; the OEM rechargeable pack used NiCd, not NiMH. Using NiMH in the regular pack works fine, and if you charge the cells individually in a smart charger like the Maha C-9000 you'll get quite a few more cycles, IME. On 10/28/18, Anthony Coghlan wrote: > Hi - hope everyone is having a good weekend. Has anyone ever used the > DuPont BERG jacks on the NEC-8201? The manual describes them as 19,200 > baud serial ports, basically. Wondering for what they might be useful. > > Also, does anyone have experience refurbishing a rechargeable battery pack > for the 8201 with modern rechargeable batteries? Does this work and does > the battery pack still charge well from the original power supply, despite > much higher modern capacities? Is one better off just using rechargeable > batteries in a regular battery pack? Is there a way to adapt a regular > pack to charge rechargeable batteries? Thanks - lots of questions... > > Best wishes, > Anthony >
[M100] NEC 8201 rechargeable battery packs and BERG jacks
Hi - hope everyone is having a good weekend. Has anyone ever used the DuPont BERG jacks on the NEC-8201? The manual describes them as 19,200 baud serial ports, basically. Wondering for what they might be useful. Also, does anyone have experience refurbishing a rechargeable battery pack for the 8201 with modern rechargeable batteries? Does this work and does the battery pack still charge well from the original power supply, despite much higher modern capacities? Is one better off just using rechargeable batteries in a regular battery pack? Is there a way to adapt a regular pack to charge rechargeable batteries? Thanks - lots of questions... Best wishes, Anthony
