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Two yellow 20V 4000mAh lithium-ion batteries in a carton

THISS

THISS 2X 20V 4000mAh Li-Ion Battery Pack for Dewalt DCB2045

SKU CH-R8YH-G133E

Two 20 V 4000 mAh lithium-ion packs replace Dewalt DCB2045 batteries across the 20 V MAX tool range

  • Rated voltage20v
  • Corded or cordlessCordless
  • Battery typeLithium Ion
  • Product typeBatteries
  • Color and finishYellow
  • Number of items2 pack
  • Two 4000 mAh lithium-ion packs extend runtime
  • 20 V output powers the full Dewalt 20 V MAX tool range
  • Replaces original DCB2045 and DCB200 series batteries
  • Compatible with DCD, DCF, DCG and DCS series drills, drivers, grinders and saws
  • 5-year manufacturer warranty backs the pack

Two-Pack 20 V Li-Ion Replacements

This pair of 20 V lithium-ion packs replaces Dewalt DCB2045 cells and fits the full 20 V Max tool line. Each unit delivers 4000 mAh capacity for extended runtime on drills, drivers, saws and grinders. The yellow finish matches original equipment and the cordless format requires no tether. Two batteries keep one on charge while the other works.

Thermal and Power Behaviour

Lithium-ion chemistry maintains steady voltage through the discharge curve and generates minimal heat under typical drilling or fastening loads. No active cooling is needed and the packs run silently in normal use. Self-discharge is low so a stored pack holds charge for months. The 5-year warranty period reflects the manufacturer’s confidence in cell longevity.

Upgrade From Lower-Capacity Packs

Users moving from 1.5 Ah or 2.0 Ah originals gain noticeably longer run time per charge without changing tools. The jump is worthwhile when jobs demand continuous operation such as deck building or repeated hole sawing. Buyers who need higher voltage platforms or larger single-pack capacities will not be served by this 20 V 4000 mAh format.

How it compares

Measured against everything we stock in Disposable & Rechargeable Batteries, at today’s prices. Recalculated every night.

Price $34.99
Pricier than about 55% of the 985 comparable items (median $28.99).

Specifications

Product
Product typeBatteries
Color and finishYellow
Power
Rated voltage20v
Corded or cordlessCordless
Battery typeLithium Ion
In the box
Number of items2 pack

Questions about this item

How do I install the 20V 4000mAh pack into a DCD780 drill and what step do people skip?

Slide the pack onto the tool's battery rail until the latch clicks; the step often missed is fully seating the pack so both contacts engage before use.

What maintenance will the 4000mAh Li-Ion cells need over their service life?

Store at roughly half charge in a cool, dry place; recharge every few months if unused, and replace the pack when run-time drops noticeably.

What limit appears first during sustained high-drain use of the 20V pack?

The built-in protection circuit will cut output if the cells overheat or voltage sags too far, stopping the tool until the pack cools.

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