SmarToools RB20 AAA 1.5V 750 mWh Rechargeable Battery (2 Pcs Set)

The SmarToools RB20 AAA 1.5V 750 mWh Rechargeable Battery (2 Pcs Set) is a two-pack of lithium-ion AAA cells for Bangladeshi households, students and home workers who want rechargeable cells charged over a Type-C USB cable. This page covers what the listing says, how to set the cells up and where they fit in your daily kit.

• Overview
• Key features
• Specifications
• How to use / set up
• Compatibility and what is in the box
• Who should buy it in Bangladesh
• Alternatives in our store
• Warranty and support
• Delivery, returns and ordering
• Frequently asked questions

Overview of the SmarToools RB20 set

The SmarToools RB20 is listed as a rechargeable AAA battery with a nominal voltage of 1.5V, sold as a set of two pieces. According to the listing, the material is lithium-ion battery and the charging method is a Type-C USB cable at 5V. That pairing is the main reason many buyers look at the SmarToools RB20 set, because it lets you top up cells from a USB source instead of buying a fresh pack each time the cells run down.

For general background on how chargers work and why the charging method matters, read the battery charger overview on Wikipedia. That article is independent of this listing, so treat it as background rather than as a description of the SmarToools RB20. The listing itself names only the charging method, the voltage and the connector type, and this page sticks to those points when it describes the product.

Read the listing as a set of figures from the maker. Where it gives a figure, this page repeats it with the attribution listed as, so you can see which numbers come from the maker. Where the listing is silent, the page says so instead of filling the gap with guesses. For a buyer in Bangladesh, the useful checklist is short: cell type, size, charging connector, listed protections and warranty. The SmarToools RB20 sections below follow that checklist.

Key features

Lithium-ion rechargeable cells

According to the listing, the material of the SmarToools RB20 is lithium-ion battery, in a rechargeable AAA format with a nominal voltage of 1.5V. For a household, that means the cells can be used again instead of being thrown away after one discharge. Typical uses include household gadgets that take AAA cells, such as remote controls and wall clocks, but check the device manual before you decide. Keep one charged pair in a labelled container and rotate the pairs so you know which set is ready. The listing does not describe the chemistry in more depth, so this page does not go beyond its wording.

Charging through a Type-C USB cable

The listing gives the charging method as a Type-C USB cable and the charging voltage as 5V. In everyday terms, you need a USB source with a Type-C connection, such as a USB adapter or a laptop port, and a matching cable. Charging the SmarToools RB20 is therefore a question of planning rather than finding a special charger. The listing gives a charging time of 2 hours (+-0.5), so start a charge in the evening when power is stable. Keep the connector clean and dry, especially in the humid months when moisture can gather around ports.

LED indicators for charging status

According to the listing, the LED indicators blink when the SmarToools RB20 cells are charging and stay on when they are fully charged. Those are the only indicator behaviours the listing describes, so this page does not explain any other light patterns. Use the blinking and steady states as your guide during a charge. When the indicator stays on, the listing says the cells are fully charged, and you can plan to use them. In a busy Dhaka household, where the charger may move between rooms or be plugged in at night, a simple visual status is helpful.

Listed protection features

The SmarToools RB20 listing marks short-circuit, overflow, overcharge and over-discharge protection as YES. These are listed features, and this page repeats them as listed by the maker, not as a guarantee for every situation. For everyday use, keep the habits simple: remove the cells from a device that is not working, do not mix old and new cells in the same device, and follow the manual that comes with your device. The listing gives no further detail about how each protection works, so read the word YES no further than the listing does. The SmarToools RB20 protections are one part of the buying decision, not the whole of it.

Two-pack set and listed dimensions

The product name describes this as a 2 Pcs Set, so the listed quantity is two rechargeable AAA cells. The listing gives a diameter of min 9.8mm and max 10.5mm, a height of min 43.5mm and max 44.5mm, and a weight of 6.9(+-0.5)g. Use these ranges to check fit in your device’s battery compartment before you commit. Do not rely on how a cell looks, since the listed range is the figure to compare. The SmarToools RB20 two-pack is the set for buyers who want a pair in one order.

Capacity figures as listed

The listing gives the capacity of the SmarToools RB20 as 750 mWh and a typical value of 400mAh. Both figures are the maker’s listed values, and this page does not convert between them. It also does not claim how long a pair will run in any particular device, because the listing does not give that information. If your device manual asks for a capacity value, compare the listed numbers with that manual and note which set you charged and when. The specification table below puts the SmarToools RB20 figures together.

Specifications

The specifications for the SmarToools RB20 are set out below, as the product listing gives them.

These are listed specifications from the SmarToools RB20 product listing, shown with the maker’s wording.

How to use / set up

Start by opening the pack and counting the cells. Check that you have two pieces, matching the 2 Pcs Set in the product name, before you put them to work. Keep the SmarToools RB20 packaging until you are sure the set is what you ordered, since that makes any return or check easier. Handle the cells gently and keep them away from children.

Charge fully before first use. The listing gives a charging time of 2 hours (+-0.5), so put the SmarToools RB20 cells on charge when you have a few hours free and leave them until the LED indicators stay on. Use a Type-C USB cable and a 5V USB source, as the listing describes. Avoid plugging the cells into a source you do not trust, and do not leave the set charging unattended in a hot room. A cool, ventilated spot suits the warm climate of Bangladesh.

A simple routine helps. Charge the pair on the same day each week, label the box, and check the indicators before you move the cells to a device. This keeps the rechargeable routine predictable and avoids finding a flat set at the wrong moment.

When you fit the SmarToools RB20 cells, follow the manual that comes with your device for battery type and insertion. This page does not describe polarity markings, the layout of any battery compartment or the installation steps, because the listing does not include them. Once the cells are in, check that the device responds. If it does not, remove the cells, make sure the contacts are clean and try again rather than forcing the battery door closed.

Store the charged cells in a cool, dry place away from metal objects that could touch both ends at once, such as loose coins or keys. Humidity is a real factor in Bangladesh, especially in the monsoon season, so a closed container with a lid is practical. Keep each SmarToools RB20 pair in the same box and label the box with the date of your last charge.

Load-shedding is common in many parts of Bangladesh, and an outage can arrive at the wrong moment. Keep one charged SmarToools RB20 set in a closed box near the device it powers, so that a power cut does not leave you without spare cells. Plan top-ups for hours when power is stable rather than during the outage itself.

If the SmarToools RB20 set does not behave as you expect, check the charge first, then the fit, then the device manual. Do not force the cells into a compartment that does not close easily. If the problem continues after a full charge, write down what you saw, including the LED state and the time of charging, and contact us using the details in the delivery section below.

Compatibility and what is in the box

For the SmarToools RB20, the listing confirms the set is sold as two pieces, the AAA type, the lithium-ion material and the Type-C USB charging method. It does not list compatible devices. Confirm your model and size before you order, and check the battery type in the manual of any device you own before you put the cells into it. If you are unsure whether a device takes AAA cells, ask us before you order and describe the device and its model.

The listing does not list the items in the box, and it does not confirm whether a Type-C cable or a charger is included. Do not assume that a cable comes with the SmarToools RB20 set. If a cable matters for your plan, check your order summary or message us before you order. The product name confirms only that the order is a 2 Pcs Set.

Confirmed items for the SmarToools RB20 are the rechargeable lithium-ion material, the 1.5V nominal voltage, the 750 mWh capacity figure, the listed dimensions and weight, the LED indicator behaviour and the listed protections. Items not confirmed by the listing include the device compatibility list, the box contents and any charger accessories. Those are the points to plan around when you decide whether the set suits you.

Who should buy it in Bangladesh

A household with a few remote controls, a wall clock and a torch may find the SmarToools RB20 a practical choice, because the cells are rechargeable and charged through a USB source named in the listing. A family that keeps a small drawer of spare cells for everyday gadgets fits this profile well. The set also works as a backup, so a dead pair does not leave the household waiting for a shop to open.

Students and home workers who use a small wireless keyboard, a mouse or another AAA-powered accessory can plan a weekly top-up from a laptop or a USB adapter. A pair of SmarToools RB20 cells can suit a desk already close to a USB port. Start with one device, see how the routine suits you, and then add more.

Small offices, shops and meeting rooms in Dhaka, Chattogram and other cities often rely on AAA-powered remotes, sensors or clocks. For those places, the SmarToools RB20 two-pack is one way to plan around single-use cells, provided the devices take the format. Power cuts and humid storage are real concerns in these settings, so a labelled, closed box of charged cells is a practical habit.

Travellers and commuters in Dhaka who carry a torch or a small remote on journeys can pack a charged pair in a closed pouch. Keep the pouch away from keys and coins, and recharge the set at home in the evening, when power is steadier.

Who may not be the right buyer: anyone who needs a confirmed list of compatible devices, a charger in the box, or capacity figures beyond the listed values. If your device needs a specific battery standard, ask us before you rely on the set. The SmarToools RB20 suits everyday AAA needs with a USB-charged option.

Students in shared flats and families in apartments may appreciate a rechargeable option that avoids a separate battery shop trip. Charging overnight from a USB source in a shared room can work, provided the cable and socket are in good condition. A labelled box of SmarToools RB20 cells helps everyone in a shared home know which pair is charged and which is in use.

Alternatives in our store

If you want to compare the SmarToools RB20 with other options, start with another SmarToools battery in our range, SmarToools RB20 AA 1.5V 2600mWh Rechargeable Battery ( 2 Pcs Set), and a battery charger in our range, Liitokala Lii M4S 4-Slot Multifunctional Battery Charger.

For a phone battery, our range includes Hoco J112 iPx Smart Li-Polymer 2716mAh iPhone X Battery. For a different lithium-ion option, see 21700A Lithium-Ion Rechargeable Battery – 4.2V 5000mAh High Capacity (Made in Japan). Each link opens its own page, so you can review those items in your own time. Browse the full category at Batteries & Chargers.

Warranty and support

Warranty: 6 Months seller warranty.

Delivery, returns and ordering

We deliver all over Bangladesh and you pay cash on delivery. Delivery usually takes 1–3 days inside Dhaka city and 2–5 days outside Dhaka. Plan around those timings rather than an exact date when you order the SmarToools RB20 two-pack.

You can return it within 7 days of delivery. Read the full terms on our Delivery & Returns policy page when you place the order, so you know what to expect for the SmarToools RB20.

Questions before ordering: call 09638054751, message us on Facebook Messenger or email care@gadgetsuperb.com. When you place the order, check the quantity on your order summary, keep the cash ready for delivery and ask the delivery person to confirm the SmarToools RB20 set before you accept it.

Frequently asked questions

Is the SmarToools RB20 a rechargeable AAA battery?

Yes. The listing gives the type as AAA, the material as lithium-ion battery and the charging method as a Type-C USB cable.

What does the order include?

The product name describes a 2 Pcs Set, so the listed quantity is two cells. The listing does not confirm whether a cable or charger is included.

How long does the SmarToools RB20 take to charge?

According to the listing, the charging time is 2 hours (+-0.5). The LED indicators blink while charging and stay on when the cells are fully charged.

What voltage does the set use?

The listing gives a nominal voltage of 1.5V and a charging voltage of 5V. These are listed values from the maker.

Does the SmarToools RB20 have protection features?

The listing marks short-circuit, overflow, overcharge and over-discharge protection as YES. This page repeats that as listed by the maker.

What are the listed dimensions of the set?

The listing gives a diameter of min 9.8mm and max 10.5mm, and a height of min 43.5mm and max 44.5mm. Compare these with the battery compartment in your device manual.

Does the SmarToools RB20 come with a warranty?

Yes. The listed warranty for the SmarToools RB20 is 6 Months seller warranty.

Can I pay on delivery for an order in Bangladesh?

Yes. We deliver all over Bangladesh and you pay cash on delivery. You can return it within 7 days of delivery.

Where can I ask before I order?

Call 09638054751, message us on Facebook Messenger or email care@gadgetsuperb.com. Our Delivery & Returns policy page has the full terms.