Topcon DB-75C Rechargeable NiMH Battery Holder 314930702. Needed for Rechargeable batteries on RL-200 Series Lasers

The Topcon DB-75C rechargeable battery holder (part number 314930702) is the OEM-engineered solution for contractors who demand reliable, cost-effective power from their RL-200 1S and RL-200 2S rotating lasers. By accepting rechargeable NiMH batteries, the DB-75C eliminates your dependence on disposable alkalines—reducing operating costs and ensuring your laser stays running through full shifts without hunting down batteries at the supply house.

Overview: Jobsite-Ready Rechargeable Power

The DB-75C slots directly into the Topcon RL-200 series battery compartment, converting your instrument from alkaline to rechargeable NiMH operation in seconds. Whether you're controlling grade on a commercial site, setting footings for a residential pour, or running drainage elevations across a large pad, consistent power delivery matters. NiMH chemistry holds voltage more evenly through discharge than alkaline cells, so your laser maintains stable, accurate rotation right up until the battery needs a recharge—no gradual fade. Pair the DB-75C with Topcon's compatible charger and carry a second charged holder to run back-to-back shifts without interruption.

Key Specifications

• Part Number: 314930702
• Model: DB-75C
• Battery Type: Rechargeable NiMH (batteries not included)
• Compatible Instruments: Topcon RL-200 1S, RL-200 2S rotating lasers
• OEM Status: Genuine Topcon replacement part
• Form Factor: Drop-in replacement for standard RL-200 series battery compartment

Key Features

• Genuine OEM Topcon component — guaranteed fit and performance with RL-200 1S and 2S instruments
• Converts RL-200 series lasers from alkaline to rechargeable NiMH operation
• Reduces long-term battery operating costs on high-use jobsites
• Consistent voltage delivery through discharge for stable laser performance
• Rugged housing designed to withstand the dust, vibration, and handling of active construction environments
• Swappable design allows hot-swap capability when a second charged holder is on hand
• Compatible with Topcon's BC-27BR and comparable NiMH charger systems

Job Applications

Commercial Slab and Flatwork: Extended pours demand uninterrupted laser operation. Running the DB-75C with a pre-charged spare means your RL-200 never goes dark mid-pour while the screed crew is still working.

Site Grading and Earthwork: All-day grade control on cut-and-fill operations drains batteries fast. NiMH rechargeables in the DB-75C deliver full-shift runtime and recharge overnight, ready for the next day's work.

Residential Foundation Layout: Footings, stem walls, and slab elevations require precision from the first shot to the last. The DB-75C keeps your RL-200 performing accurately without the mid-job voltage drop common with aging alkalines.

Drainage and Utility Grading: Pipe grade and drainage layout jobs often run long and in remote areas where buying replacement batteries isn't practical. A rechargeable setup with the DB-75C makes field power management simple.

Compatible Accessories

• Topcon RL-200 1S Single-Slope Rotating Laser
• Topcon RL-200 2S Dual-Slope Rotating Laser
• Topcon BC-27BR NiMH Battery Charger
• Topcon LS-80L Laser Receiver
• Topcon Carry Case for RL-200 Series

Related Guides

• How to Switch Your Topcon RL-200 from Alkaline to Rechargeable Power
• NiMH vs. Alkaline Batteries for Rotating Lasers: What Contractors Need to Know
• Topcon RL-200 Series: Setup, Calibration, and Maintenance Tips
• Managing Laser Power on Multi-Day Commercial Jobsites

Frequently Asked Questions

What batteries go in the Topcon DB-75C holder?

The DB-75C is designed to hold rechargeable NiMH batteries. The batteries themselves are not included with the holder. Refer to your Topcon RL-200 user manual or contact Express Tools for the correct NiMH cell size and quantity for your specific instrument.

Is the DB-75C compatible with the Topcon RL-200 2S as well as the 1S?

Yes. The DB-75C battery holder is compatible with both the Topcon RL-200 1S single-slope and RL-200 2S dual-slope rotating lasers. It is a direct OEM replacement for both instruments.

Can I still use alkaline batteries in my RL-200 if I own the DB-75C?

The DB-75C is specifically configured for rechargeable NiMH batteries. Your RL-200 can still accept alkaline batteries using the standard alkaline holder. The DB-75C is an additional or replacement holder that converts your power source to rechargeable operation.

Do I need a special charger for the NiMH batteries used in the DB-75C?

Yes. NiMH batteries require a compatible NiMH charger — do not attempt to charge them with a standard alkaline charger. Topcon offers compatible chargers such as the BC-27BR. Contact Express Tools to confirm the correct charger for your setup.