etc
Flashlight Enthusiast
I have a Garmin GPS, Montana 700.
It's a nice device. However I am frustrated by two things. The Lithium-Ion battery is proprietary and is enclosed in a plastic shell. The mAh is only 3300 or such. And with age it declines. I think my 2-year old unit is under 3,000 mAh. I have not found the runtime to be very good. Not like the older 60Csx which got 24 hours on a pair of L91s, or close to that on Eneloops. The Montana 700 screen is much larger, finer, the power consumption is greater due to more pixels. I've tested Eneloops in it and the runtime is awful. I think in part due to 1.2V x 3 which doesn't match the 4.2V of the Li-ion battery. (You can run either one).
If the proprietary Li-ion fails, you have to buy another one for at least $40 and deal with the same problem, poor runtime. If Garmin goes out of business, you have no options. The 3xAA is not very good, for some reason they are fixated on 3xAA since Montana 680. That unit needs at least 4xAA to get the 4V+ to run the thing, 1.2V*3 or 3.6V of Eneloops does not run it well or long.
I want to build a batt consisting of 2x18650 enclosed in the same plastic shell as the other two. The battery that comes with is also the backplate which comes off, it's one unit. Same for the stupid 3xAA contraption. I already lost it once. If you are using the Li-ion unit, you have to find a way to store the 3xAA contraption somewhere, they did not put enough thought in the design.
2x21mm would be even better but I am not sure it will fit inside the battery compartment. Likely won't.
Left to right, Li-ion batt, the 3xAA contraption and the Montana 700 where the 2x18650 should fit.
I think the build should entail tearing the old one apart, recycling the bottom portion for the fit into it, the 2x18mm cells fitted into it and the cover printed. Also the main thing and as its relevant here, how do adapt the 2x18mm in parallel (not series, obviously) to provide the same voltage as the single Li-ion that came with it? I need a contraption which fits 2x18650 so they are removable just like the AAs are.
I think I can recycle the connector of the batt case to the connector inside the GPS. It's the inner components which mystify me, where do I get what I need?
I have a Garmin GPS, Montana 700.
It's a nice device. However I am frustrated by two things. The Lithium-Ion battery is proprietary and is enclosed in a plastic shell. The mAh is only 3300 or such. And with age it declines. I think my 2-year old unit is under 3,000 mAh. I have not found the runtime to be very good. Not like the older 60Csx which got 24 hours on a pair of L91s, or close to that on Eneloops. The Montana 700 screen is much larger, finer, the power consumption is greater due to more pixels. I've tested Eneloops in it and the runtime is awful. I think in part due to 1.2V x 3 which doesn't match the 4.2V of the Li-ion battery. (You can run either one).
If the proprietary Li-ion fails, you have to buy another one for at least $40 and deal with the same problem, poor runtime. If Garmin goes out of business, you have no options. The 3xAA is not very good, for some reason they are fixated on 3xAA since Montana 680. That unit needs at least 4xAA.
I want to build a batt consisting of 2x18650 enclosed in the same plastic shell as the other two. The battery that comes with is also the backplate which comes off, it's one unit. Same for the stupid 3xAA contraption. I already lost it once. If you are using the Li-ion unit, you have to find a way to store the 3xAA contraption somewhere, they did not put enough thought in the design.
2x21mm would be even better but I am not sure it will fit inside the battery compartment. Likely won't.
Left to right, Li-ion batt, the 3xAA contraption and the Montana 700 where the 2x18650 should fit.
I think the build should entail tearing the old one apart, recycling the bottom portion for the fit into it, the 2x18mm cells fitted into it and the cover printed. Also the main thing and as its relevant here, how do adapt the 2x18mm in parallel (not series, obviously) to provide the same voltage as the single Li-ion that came with it? I need a contraption which fits 2x18650 so they are removable just like the AAs are. So then that bracket would get wired to the output which connects to the GPS terminals .
I think I can recycle the connector of the batt case to the connector inside the GPS. It's the inner components which mystify me, where do I get what I need?
It's a nice device. However I am frustrated by two things. The Lithium-Ion battery is proprietary and is enclosed in a plastic shell. The mAh is only 3300 or such. And with age it declines. I think my 2-year old unit is under 3,000 mAh. I have not found the runtime to be very good. Not like the older 60Csx which got 24 hours on a pair of L91s, or close to that on Eneloops. The Montana 700 screen is much larger, finer, the power consumption is greater due to more pixels. I've tested Eneloops in it and the runtime is awful. I think in part due to 1.2V x 3 which doesn't match the 4.2V of the Li-ion battery. (You can run either one).
If the proprietary Li-ion fails, you have to buy another one for at least $40 and deal with the same problem, poor runtime. If Garmin goes out of business, you have no options. The 3xAA is not very good, for some reason they are fixated on 3xAA since Montana 680. That unit needs at least 4xAA to get the 4V+ to run the thing, 1.2V*3 or 3.6V of Eneloops does not run it well or long.
I want to build a batt consisting of 2x18650 enclosed in the same plastic shell as the other two. The battery that comes with is also the backplate which comes off, it's one unit. Same for the stupid 3xAA contraption. I already lost it once. If you are using the Li-ion unit, you have to find a way to store the 3xAA contraption somewhere, they did not put enough thought in the design.
2x21mm would be even better but I am not sure it will fit inside the battery compartment. Likely won't.
Left to right, Li-ion batt, the 3xAA contraption and the Montana 700 where the 2x18650 should fit.
I think the build should entail tearing the old one apart, recycling the bottom portion for the fit into it, the 2x18mm cells fitted into it and the cover printed. Also the main thing and as its relevant here, how do adapt the 2x18mm in parallel (not series, obviously) to provide the same voltage as the single Li-ion that came with it? I need a contraption which fits 2x18650 so they are removable just like the AAs are.
I think I can recycle the connector of the batt case to the connector inside the GPS. It's the inner components which mystify me, where do I get what I need?
I have a Garmin GPS, Montana 700.
It's a nice device. However I am frustrated by two things. The Lithium-Ion battery is proprietary and is enclosed in a plastic shell. The mAh is only 3300 or such. And with age it declines. I think my 2-year old unit is under 3,000 mAh. I have not found the runtime to be very good. Not like the older 60Csx which got 24 hours on a pair of L91s, or close to that on Eneloops. The Montana 700 screen is much larger, finer, the power consumption is greater due to more pixels. I've tested Eneloops in it and the runtime is awful. I think in part due to 1.2V x 3 which doesn't match the 4.2V of the Li-ion battery. (You can run either one).
If the proprietary Li-ion fails, you have to buy another one for at least $40 and deal with the same problem, poor runtime. If Garmin goes out of business, you have no options. The 3xAA is not very good, for some reason they are fixated on 3xAA since Montana 680. That unit needs at least 4xAA.
I want to build a batt consisting of 2x18650 enclosed in the same plastic shell as the other two. The battery that comes with is also the backplate which comes off, it's one unit. Same for the stupid 3xAA contraption. I already lost it once. If you are using the Li-ion unit, you have to find a way to store the 3xAA contraption somewhere, they did not put enough thought in the design.
2x21mm would be even better but I am not sure it will fit inside the battery compartment. Likely won't.
Left to right, Li-ion batt, the 3xAA contraption and the Montana 700 where the 2x18650 should fit.
I think the build should entail tearing the old one apart, recycling the bottom portion for the fit into it, the 2x18mm cells fitted into it and the cover printed. Also the main thing and as its relevant here, how do adapt the 2x18mm in parallel (not series, obviously) to provide the same voltage as the single Li-ion that came with it? I need a contraption which fits 2x18650 so they are removable just like the AAs are. So then that bracket would get wired to the output which connects to the GPS terminals .
I think I can recycle the connector of the batt case to the connector inside the GPS. It's the inner components which mystify me, where do I get what I need?
