![]() If you want to charge the battery, remove it from the adapter and place it on the battery’s charger. The adapter is only an output device, which means it only let’s power out, not in. Unfortunately the Dewalt 18v to 20v adapter’s other problem is that you cannot charge a battery through it. Can’t Charge Battery With Adapter OnĪnd as previously stated, sometimes the adapter is the hardest thing to remove. Delicate parts on the adapter (like the clips, ridges and electronics) are the most subjected to dirt and debris exposure which is a big contributor of faults on the adapter. It is good to keep the Dewalt 18v to 20v adapter clean after every use so as to rid it of any clogging that may come about because of debris. Especially for some different 18v powertools that may have a different design for the battery placement area. The problem is that they do not (on occasion) seem to work well. ![]() These are the clips (or holders) on the Dewalt 18v to 20v adapter that help hold the adapter into place when inserted into a 18v powertool. There is an extra ridge(s) on the higher ampere hour batteries (as compared to lower ampere batteries) that hinder the insertion of them into the adapter such that they stop half way.The Dewalt 18v to 20v adapter is only for 5Ah 20v batteries, so this critical distinction is important to take not of when purchasing a battery or the adapter itself. Most commonly from 6Ah 20v batteries and higher. Causing the battery to tighten to the adapter.Īlthough the Dewalt 18v to 20v adapter is a 20v adapter ( it says so in the name) some 20v batteries do not fit. Debris and dirt can easily cling onto these areas. It is also important to keep the Dewalt 18v to 20v adapter clean, especially on parts that interlock and slide into or with the battery.It’s important to press the release button (large button in front of all 20v batteries) when attempting to release the battery from the adapter. The batteries can get stuck in their placement. Which can be an even bigger problem if the 20v battery needs to be used urgently on another 20v powertool.Īlthough the Dewalt 18v to 20v was made for 20v batteries. When the 20v battery is placed into the Dewalt 18v to 20v adapter this problem sees the battery being hard to remove from the adapter. It is relatively cheaper to replace an 18v battery than it would be to buy a new adapter. In such a case using a 18v battery with a Dewalt 18v tablesaw would be good enough. A problem if you’re sawing a long piece of wood but can only go pass a certain point because the adapter adds size to the battery, making it hit against the wood thus making the tablesaw unmoveable. And with some powertools that require a large work area and distance like the Dewalt 18v tables tablesaw, the Dewalt 18v to 20v adapter gets in the way. ![]() Meaning from someone else’s point of view, you have two batteries stacked one on top of another. It may be lighter than the 20v battery it attachs to, but it is objectively the same size as one. You will damage your 20V li-ion batteries by running them down fully using one of these generic crap adapters.The Dewalt 18v to 20v adapter makes powertools (like the hand drill) a lot bulkier and uglier. Note: do not buy generic no-name adapters from EBay or Amazon, because they do not have this low-voltage protection circuitry. That's why they say not to use it with flashlights. It also pulses the voltage, which reduces arcing in the mechanical switches which are more common in the old 18V tool line. This adapter stops the flow when the voltage gets down to about 15v. Li-ion batteries will get damaged if the voltage goes too low. What this adapter does is protect the li-ion batteries from damage from over-discharging them. The 20V li-ion packs provide 20V at full charge, down to 15V at fully discharged. They run on 15-20V, plus a healthy safety margin.Īny voltage in those ranges, plus or minus 10 or 20%, is fine for the tools. The "20V" tools, designed for li-ion batteries, don't run on 20V. They run on any voltage from 0 to 18V, plus a healthy safety margin. The "18V" tools, designed for nicad batteries, don't run on 18V. That's not what the DCA1820 does, because the tools don't need that. No, there is no dropping diode, nor DC-DC converter.
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