Can I use an 18V battery in a 14.4 V drill?

using the cutting drill bit from dremel you are going it cut out the inside of the socket hole for the mast of the battery in the back two corners so the square base of the battery will slide past the yellow housing of the drill.

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secondly cut off the locking tabs from the drill as they interfere with the battery sliding into the drill to allow the contacts of the battery to mate with the recessed pins of the drill.

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Bacon! said:

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There's no way that any 18V drill operating at 14.4V would have as much power, I notice that easily when my 18V drill batteries drop voltage that much. If it just used faster gearing to achieve similar RPM then it wouldn't have the torque it does. I expect it would burn out at 18V if under a high load.

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Hey Bacon many thanks for jumping in. I agree with all you've noted except the bit I've quoted, can you confirm you have said what you intended to say, because this thread is about higher voltage batteries for lower stated voltage tools.

Also commenting on the battery type, in overview, the battery type is relevant to the extent each type of battery has different characteristics, I do not wish to set all that out, beyond observing the voltage is the voltage where-ever it comes from, but secondly the ability of the power source to maintain that voltage under increasing load is IMO highly relevant. Which in writing this makes me realise where we are over volting a tool there may be some advantage (that is risk reduction) in using the LOWER power pack versions, that is a 2 A hr 18V battery has less capability of damaging a tool than a say 6 A hr 18V pack which under load will pump more current and tend to maintain the voltage, the power, the wattage and the heat going through the tool, which is usually what kills parts - too much heat in the wrong places...

Also I would make clear that the charger for any over volt battery will need to match that pack, and not generally be the original tool's charger, unless the original charger covers the higher volt cell as well, for example my Metabo ICS 10 charger charges NI-cd and NiMH to 18V but not Li-ion batteries so it could not be used for the AEG batteries I was considering but could be used for a NiMH 18 battery pack.

As has been suggested I searched for information on my motor type and cannot verify it is also used in 18V drills. Also the electronics in my drill uses the "impuls" electronic pulse technology and again seems limited in use to the 12 and 15.6V versions of my drill. If I fry the tool through overvolting that will really kill the tool with availability of replacement parts difficult at best. Therefore I've decided given the special case of this drill I am better to just replace the existing cells with NiMH batteries. The impuls function works well so I wish to preserve that drill so hereon I will "baby it" to more lighter and special duties.

My decision should not stop others over volting non impuls drills especially where replacement parts are available and or confirmation the motors are in any event designed for the higher voltages.

Hey Bacon many thanks for jumping in. I agree with all you've noted except the bit I've quoted, can you confirm you have said what you intended to say, because this thread is about higher voltage batteries for lower stated voltage tools.Also commenting on the battery type, in overview, the battery type is relevant to the extent each type of battery has different characteristics, I do not wish to set all that out, beyond observing the voltage is the voltage where-ever it comes from, but secondly the ability of the power source to maintain that voltage under increasing load is IMO highly relevant. Which in writing this makes me realise where we are over volting a tool there may be some advantage (that is risk reduction) in using the LOWER power pack versions, that is a 2 A hr 18V battery has less capability of damaging a tool than a say 6 A hr 18V pack which under load will pump more current and tend to maintain the voltage, the power, the wattage and the heat going through the tool, which is usually what kills parts - too much heat in the wrong places...Also I would make clear that the charger for any over volt battery will need to match that pack, and not generally be the original tool's charger, unless the original charger covers the higher volt cell as well, for example my Metabo ICS 10 charger charges NI-cd and NiMH to 18V but not Li-ion batteries so it could not be used for the AEG batteries I was considering but could be used for a NiMH 18 battery pack.As has been suggested I searched for information on my motor type and cannot verify it is also used in 18V drills. Also the electronics in my drill uses the "impuls" electronic pulse technology and again seems limited in use to the 12 and 15.6V versions of my drill. If I fry the tool through overvolting that will really kill the tool with availability of replacement parts difficult at best. Therefore I've decided given the special case of this drill I am better to just replace the existing cells with NiMH batteries. The impuls function works well so I wish to preserve that drill so hereon I will "baby it" to more lighter and special duties.My decision should not stop others over volting non impuls drills especially where replacement parts are available and or confirmation the motors are in any event designed for the higher voltages.

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