Do not use an extension cord unless it

•	Do not use an extension cord unless it
•	Do not use an extension cord unless it	Volts			Minimum Gauge for Cord Sets
	is absolutely necessary. Use of improper	Volts			Total Length of Cord in Feet
	extension cord could result in risk of fire,	120V			0-25	26-50	51-100	101-150
	electric shock, or electrocution.	240V			0-50	51-100 101-200		201-300
•	An extension cord must have adequate	Ampere Rating				American Wire Gauge
	wire size (AWG or American Wire Gauge)	More		Not more		American Wire Gauge
	for safety. The smaller the gauge number	Than		Than
	of the wire, the greater the capacity of the	0	-	6	18	16	16	14
	cable, that is 16 gauge has more capacity	6	-	10	18	16	14	12
	than 18 gauge. When using more than one	10 -		12	16	16	14	12
	extension to make up the total length, be	12 -		16	14	12	Not Recommended
	sure each individual extension contains at
•	least the minimum wire size.
	least the minimum wire size.
	Do not place any object on top of charger or place the charger on a soft surface
	that might block the ventilation slots and result in excessive internal heat. Place the
	charger in a position away from any heat source. The charger is ventilated through slots
•	in the top and the bottom of the housing.
•	Do not mount charger on wall or permanently affix charger to any surface. The charger
•	is intended to use on a flat, stable surface (i.e., table top, bench top).
•	Do not operate charger with damaged cord or plug — have them replaced immediately.
•	Do not operate charger if it has received a sharp blow, been dropped, or otherwise
•	damaged in any way. Take it to an authorized service center.
•	Do not disassemble charger; take it to an authorized service center when service or repair
•	is required. Incorrect reassembly may result in a risk of electric shock, electrocution or fire.
•	Disconnect the charger from the outlet before attempting any cleaning. This will reduce
•	the risk of electric shock. Removing the battery pack will not reduce this risk.
•	NEVER attempt to connect 2 chargers together.
•	The charger is designed to operate on standard household electrical power (120 Volts).
	Do not attempt to use it on any other voltage.

SAVE THESE INSTRUCTIONS

IMPORTANT SAFETY INSTRUCTIONS FOR BATTERY PACKS

WARNING: For safe operation, read this manual and manuals originally supplied with tool before using the charger.

The battery pack is not fully charged out of the carton. Before using the battery pack and charger, read the safety instructions below. Then follow charging procedures outlined.

Read all Instructions

• Do not incinerate the battery pack even if it is severely damaged or is completely worn out. The battery pack can explode in a fire. Toxic fumes and materials are created when battery packs are burned.

• Do not charge or use battery in explosive atmospheres, such as in the presence of flammable liquids, gases or dust. Inserting or removing the battery from the charger may ignite the dust or fumes.

• If battery contents come into contact with the skin, immediately wash area with mild soap and water. If battery liquid gets into the eye, rinse water over the open eye for 15 minutes or until irritation ceases. If medical attention is needed, the battery electrolyte for Li-ion batteries is composed of a mixture of liquid organic carbonates and lithium salts.

• Contents of opened battery cells may cause respiratory irritation. Provide fresh air. If symptoms persist, seek medical attention.

WARNING: Burn hazard. Battery liquid may be flammable if exposed to spark or flame.

• Charge the battery packs only in Black & Decker chargers.

• DO NOT splash or immerse in water or other liquids. This may cause premature cell failure.

• Do not store or use the tool and battery pack in locations where the temperature may reach or exceed 105°F (40˚C) (such as outside sheds or metal buildings in summer). WARNING: Never attempt to open the battery pack for any reason. If battery pack case is

cracked or damaged, do not insert into charger. Do not crush, drop or damage battery pack. Do not use a battery pack or charger that has received a sharp blow, been dropped, run over or damaged in any way (i.e., pierced with a nail, hit with a hammer, stepped on). Damaged battery packs should be returned to service center for recycling.

LST400R, LST400, LST420R, LST420 specifications

Black & Decker is recognized for producing high-quality outdoor power tools, and their string trimmers, particularly the LST420, LST420R, LST400, and LST400R models, are exemplary of their innovation and commitment to efficiency. These cordless electric trimmers combine robust performance with user-friendly features, catering to both novice and experienced gardeners.

The LST420 and LST420R models feature a powerful 40V lithium-ion battery, ensuring extended run times and plenty of cutting power. Both models utilize a premium 12-inch cutting width, allowing users to trim and edge grass and weeds efficiently. Weighing in at around 6.5 pounds, these trimmers are lightweight, making them easy to maneuver and reducing user fatigue during extended periods of use.

One of the standout features of the LST420 and LST420R is the automatic feed spool, which continuously feeds the line when needed, eliminating interruptions during work. Furthermore, users can easily switch between trimming and edging modes with a simple turn of the shaft, thanks to the innovative pivoting head design. This feature enhances versatility, allowing users to achieve a professional finish on various landscaping tasks.

The LST400 and LST400R also sport the reliable 40V lithium-ion battery and 12-inch cutting width. However, these models feature a slightly different design. The LST400 is designed with a telescoping shaft that can be adjusted for different heights, offering added comfort and control for users of varying statures. With the addition of a secondary handle, it provides improved stability during operation.

All four models boast a relatively quiet operation compared to gas-powered trimmers, which adds convenience to residential areas while minimizing noise pollution. The efficient brushless motor technology found in these trimmers enhances durability and runtime, further highlighting Black & Decker's commitment to sustainability and user convenience.

In summary, the Black & Decker LST420, LST420R, LST400, and LST400R offer a blend of power, versatility, and user-friendly features. With their lightweight designs, automatic feed spooling, adjustable shafts, and efficient battery systems, they are ideal choices for maintaining a neat and tidy lawn while ensuring comfort and ease of use for the operator. These trimmers embody the brand's dedication to quality and innovation in outdoor power tools, making them a reliable choice for homeowners and gardening enthusiasts alike.