This appliance includes some or all of the following features.
The battery needs to be charged before first use and whenever it fails to produce sufficient power on jobs that were easily done before.
The battery may become warm while charging; this is normal and does not indicate a problem.
Warning! Do not charge the battery at ambient temperatures below 10 °C or above 40 °C. Recommended charging temperature: approx. 24 °C.
Note: The charger will not charge a battery if the cell temperature is below approximately 10 °C or above 40 °C. The battery should be left in the charger and the charger will begin to charge automatically when the cell temperature warms up or cools down.
The green LED will flash indicating that the battery is being charged.
The completion of charge is indicated by the green LED remaining on continuously. The pack is fully charged and may be used at this time or left in the charger
Warning! Recharge discharged batteries as soon as possible after use or battery life may be greatly diminished.
Charger diagnostics
This charger is designed to detect certain problems that can arise with the battery packs or the power source. Problems are indicated by one LED flashing in different patterns.
Bad Battery
The charger can detect a weak or damaged battery. The red LED flashes in the pattern indicated on the label. If you see this bad battery blink pattern, do not continue to charge the battery. Return it to a service centre or a collection site for recycling
Hot/Cold Pack Delay
When the charger detects a battery that is excessively hot or excessively cold, it automatically starts a Hot/Cold Pack delay, suspending charging until the battery has normalised. After this happens, the charger automatically switches to the Pack Charging mode. This feature ensures maximum battery life. The red LED flashes in the pattern indicated on the label when the Hot/Cold pack delay is detected.
Leaving the battery in the charger
The charger and battery pack can be left connected with the LED glowing indefinitely. The charger will keep the battery pack fresh and fully charged.
Warning! Make certain the lock-off button is not engaged to prevent switch actuation before removing or installing battery.
To install battery pack
Insert battery (13) into appliance until an audible click is heard (Figure B). Ensure battery pack is fully seated and fully latched into position.
To remove battery pack
Depress the battery release button (14) as shown in Figure C and pull battery pack out of appliance.
Fitting the guard (Fig. D, E)
Warning! Remove the battery from the appliance before attempting to attach the guard, edge guide or handle. Never operate appliance without guard firmly in place. The guard must always be on the appliance to protect the user.
Attaching the auxiliary handle (Fig. F, G, H)
Height adjustment (Fig. I, J–J3)
Warning! Adjust the length of the trimmer to obtain proper working positions shown in Figures J - J3.
Releasing the cutting line
In transit, the cutting line is taped to the spool housing.
Warning! Always use proper eye protection.
Warning! Before you begin trimming, only use the appropriate type of cutting line.
Note: Inspect area to be trimmed and remove any wire, cord, or string-like objects which could become entangled in the rotating line or spool. Be particularly careful to avoid any wire which might be bent outwardly into the path of the appliance, such as barbs at the base of a chain link fence.
Switching on and off
Operating the trimmer (Fig. I, J–J3)
POWERCOMMAND Button (Fig. K)
The POWERCOMMANDfeature allows you to advance the length of cutting line available while trimming.
Note: The trimmer will stop cutting when the POWERCOMMAND button is pressed and will resume cutting when released.
Note: Do not continue to press the POWERCOMMAND button once the maximum length is reached. This will result in overfeeding and will consume string quickly
Convert to edging mode (Fig. L, M)
Warning! The wheeled edge guide should only be used when in the edging mode.
The trimmer can be used in trimming mode or edging mode to trim overhanging grass along lawn edges and flower beds. For edging, the trimmer head should be in the position shown in Figure M. If it is not:
Edging (Fig. M)
Warning! When being used as an Edger, stones, pieces of metal and other objects can be thrown out at high speed by the line. The trimmer and guard are designed to reduce the danger. However, MAKE SURE that other persons and pets are at least 30 m away. Optimum cutting results are achieved on edges deeper than 50 mm.
Speed control & runtime extension mode (Fig. N)
This string trimmer gives you the choice to operate at a more efficient speed to extend the runtime for larger jobs, or accelerate the trimmer speed for high-performance cutting (Figure N).
Note: When in acceleration mode (#2), runtime will be decreased as compared to when trimmer is in extended runtime mode (#1).
Cutting line / line feeding
Your trimmer uses 1.65 mm diameter, Round nylon line. During use, the tips of the nylon lines will become frayed and worn and the special self feeding spool will automatically feed and trim a fresh length of line. Cutting line will wear faster and require more feeding if the cutting or edging is done along sidewalks or other abrasive surfaces or heavier weeds are being cut. The advanced automatic line feeding mechanism senses when more cutting line is needed and feeds and trims the correct length of line whenever it’s required. Do not bump unit on ground in attempt to feed line or for any other purposes.
Clearing jams and tangled line (Figures O, P, Q)
Warning! Remove the battery from the trimmer before making any assembly, adjustments or changing accessories. Such preventive safety measures reduce the risk of starting the appliance accidentally. From time to time, especially when cutting thick or stalky weeds, the line feeding hub may become clogged with sap or other material and the line will become jammed as a result. To clear the jam, follow the steps listed below.
Replacing the spool (Fig. O, P, Q, R)
Rewinding spool from bulk line (Fig. S, T, U)
Bulk line is also available for purchase from your local retailer.
Note: Hand wound spools from bulk line are likely to become tangled more frequently than BLACK+DECKER factory wound spools. For best results, factory wound spools are recommended. To install bulk line, follow the steps below:
Your BLACK+DECKER corded/cordless appliance/tool has been designed to operate over a long period of time with a minimum of maintenance. Continuous satisfactory operation depends upon proper tool/appliance care and regular cleaning.
Your charger does not require any maintenance apart from regular cleaning.
Warning! Before performing any maintenance on corded/ cordless power tools:
| Problem | Solution |
| Appliance runs slowly. | Remove battery from trimmer. Check that the spool housing can rotate freely. Carefully clean it if necessary. Check that the cutting line does not protrude more than approximately 122 mm from the spool. If it does, cut it off so that it just reaches the line trimming blade |
| Automatic line feed does not feed line. | More line is fed when the line shortens to approximately 76 mm. To determine if the line is not feeding, let line wear past this point. Keep the tabs depressed and remove the spoolcap with the spool from the spool housing in the trimmer head. Ensure that the line is not crisscrossed on the spool as detailed in (Fig. U). If it is unwind the cutting line and rewind it neatly. Inspect tracks at the bottom of spool for damage. If damaged, replace spool. Pull the cutting line until it protrudes approximately 122 mm from the spool. If insufficient cutting line is left on the spool, install a new spool of cutting line. Align the tabs on the spool cap with the cut outs in the housing. Push the spool cap onto the housing until it snaps securely into place. If the cutting line protrudes beyond the trimming blade, cut it off so that it just reaches the blade. If the automatic line feed still does not work or the spool is jammed, try the following suggestions: Carefully clean the spool and housing. Make sure you are using correct line size and diameter (2.00 mm) - smaller and larger line sizes will affect the functionality of the auto feed system. Remove the spool and check if the lever in the spool housing can move freely. Remove the spool and unwind the cutting line, then wind it on neatly again. Replace the spool into the housing. |
| Overfeeding | Ensure you are cutting with the tip of the line 177 mm from the spool. Use the edge guide if needed to ensure proper space is maintained. Ensure you are not exceeding a 10º angle as shown in (Fig. J1). Avoid contact of the line with hard surfaces such as brick, concrete, wood etc. This will prevent excessive wear and/or overfeed of line. Cut with the tip of the line |
| Line unravels when cap or spool is removed | Make sure to park the lines in holding slots (Figure P) before removing. |
Additionally, the document applies to other Black+Decker models: BDST182ST1, STC1820EPC, STC1840EPC, STC1820EPCF, STC1820PST